UGREEN CM129 USB to Triple 3.5mm External Stereo Sound Adapter is now in stock at Mascom International for KSh 2,000, sold from our Old Mutual Building shop, First Floor Room 4, Kimathi Street, Nairobi CBD. This unit is brand new and sealed. UGREEN model 40964 turns one USB 2.0 Type-A port into three 3.5mm jacks: a headphone output, a mono microphone input, and a 4-pole CTIA headset jack. The UGREEN CM129 carries a rotary volume wheel, separate mute buttons for speaker and microphone, an LED status light, and a 15cm cable. Signal-to-noise ratio sits at 85dB or better across 20Hz to 20kHz.
Built for call centre agents in Westlands and Upper Hill, transcriptionists and virtual assistants working from home, university students at Kenyatta University, JKUAT, and Strathmore sitting through evening Zoom classes, cyber cafe operators, and podcasters recording in Nairobi home studios, the UGREEN CM129 solves a specific and very common problem. Laptop headphone jacks fail. Dust, repeated plugging, and years of matatu commuting kill the internal port, and a workshop repair often costs more than KSh 2,000. The UGREEN CM129 bypasses the damaged port entirely through USB, bringing back both audio playback and microphone recording within seconds.
Unlike other electronics retailers in Kenya stocking unbranded USB dongles with one combined jack, the UGREEN CM129 gives you three separate ports, so a microphone and a pair of headphones can run at the same time without a splitter. Users consistently report that the physical mute buttons stop the awkward scramble for the software mute icon mid-meeting. At Mascom International, we're witnessing steady demand for the UGREEN CM129 from BPO teams and online tutors whose laptops shipped with a single combo jack. Come test the UGREEN CM129 at our Kimathi Street counter, or order for pay-on-arrival delivery countrywide.
Common Questions About the UGREEN CM129
What does the UGREEN CM129 do if my laptop's headphone jack has stopped working?
It replaces the failed jack completely. The UGREEN CM129 plugs into a USB 2.0 Type-A port and presents Windows, macOS, or Linux with a fresh audio device, so the machine routes playback and recording through the adapter instead of the damaged internal port. You select it once under sound settings and it stays selected. No soldering, no motherboard work, no downtime. At KSh 2,000 it costs a fraction of a Nairobi workshop's audio port replacement quote, and it moves with you to your next laptop.
Which of the three 3.5mm ports should I plug my headset into?
Use the green-marked headphone jack for speakers or headphones with a single audio plug, and the pink-marked jack for a standalone microphone with a TRS plug. The third jack is a 4-pole combined headset port for modern single-plug headsets that carry audio and voice on one cable. Older desktop headsets with two separate plugs use the first two jacks. The CM129 can drive a headset on the combo jack and headphones on the output jack together, which is why karaoke and dual-monitoring setups suit it.
Does the UGREEN CM129 need drivers on Windows, Mac, or Linux?
No drivers, no installation disc, no software download. The UGREEN CM129 uses the USB Audio Class standard that Windows 11, Windows 10, macOS, Linux, and Chrome OS already carry, so the adapter appears in your sound menu within a few seconds of plugging in. It is hot-swappable, meaning you can connect or remove it while the machine is running without a restart. An LED on the housing lights up to confirm the adapter has power and the computer has recognised it.
Will the UGREEN CM129 work with a PS4, PS5, or Android phone?
Yes on PlayStation 4 and PlayStation 5, where the console reads it as a USB headset device for game and party chat. Android phones and tablets work through a USB-C to USB-A OTG adapter, which Mascom International stocks separately. PlayStation 3 does not carry audio over USB, so the adapter will not function there. Windows tablets, Raspberry Pi boards, Chromebooks, and Android TV boxes with a spare USB port also recognise it. Confirm your device passes audio over USB before ordering, and our team will check compatibility for you.
Will my old phone headset work on the combined 4-pole jack?
It works if the headset follows the CTIA wiring standard, which covers most headsets sold in Kenya since roughly 2014, including Apple, Samsung, oraimo, and JBL models. The older OMTP standard, still found on some legacy Nokia and Sony headsets, swaps the microphone and ground contacts, so audio plays but the voice channel stays silent. A low-cost CTIA-to-OMTP converter fixes that. Bring your headset to our Kimathi Street counter and we will test it on a CM129 before you pay.
How do the volume wheel and mute buttons help during Teams or Zoom calls?
The rotary wheel adjusts output level in hardware, so you can drop the volume without leaving your call window or hunting for keyboard function keys. Two separate buttons mute the microphone and the speaker independently. Call centre agents and online tutors use the microphone mute constantly, because pressing one button is faster and more reliable than clicking an on-screen icon that sometimes lags. The LED indicator shows working status at a glance, so you always know whether your microphone is live.
Does the UGREEN CM129 sound better than my laptop's built-in jack?
In most cases yes, for one reason: it moves audio conversion outside the laptop chassis, away from the electrical noise that causes the hiss, whine, and buzzing many users hear on budget machines. The SSS1629 controller inside the CM129 handles conversion with noise-reduction circuitry and a signal-to-noise ratio of 85dB or better across the full 20Hz to 20kHz hearing range. It will not outclass a dedicated studio interface costing KSh 25,000, and Mascom International says so plainly before you buy.
How long is the cable and will it reach a desktop tower under my desk?
The cable measures 15 centimetres, which is deliberately short. It keeps the adapter close to the USB port so it does not dangle, snag, or block the neighbouring port on a laptop. For a tower sitting on the floor, plug the CM129 into a front-panel USB port, or run a USB extension cable, which Mascom International stocks in 1-metre and 3-metre lengths. The housing measures 74 x 34 x 15.5 millimetres, light enough that an extension supports it without strain.
Why buy the UGREEN CM129 instead of a cheap unbranded USB sound card in Nairobi?
Unbranded dongles sold around River Road typically give one combined jack, no volume wheel, no mute buttons, and no published signal-to-noise figure. The UGREEN CM129 publishes its numbers, carries the SSS1629 controller, and uses tinned copper conductors with shielding to keep interference out. UGREEN has traded since 2012 and honours regional warranty claims. Mascom International adds a 6-month warranty on top and handles claims from our Nairobi CBD service desk rather than sending you back to a market stall.
Technical Specifications
Audio Hardware and Signal Quality
- SSS1629 audio controller handles conversion outside the laptop chassis, cutting the electrical hiss common on internal cards
- Signal-to-noise ratio rated at 85dB or better, meaning background noise stays well below normal listening levels
- Frequency response covers 20Hz to 20kHz, the full range of human hearing, from bass lines to cymbals
- Stereo output feeds left and right channels separately for headphones, desk speakers, and monitor speaker bars
- Microphone input is mono, matching every standard 3.5mm computer microphone and headset boom arm sold locally
- Sampling rate runs at 48kHz, the rate used by Zoom, Microsoft Teams, Google Meet, and Windows recording
- Noise-reduction circuitry inside the controller suppresses interference picked up from the USB bus and nearby power cables
Port Layout and Connection Options
- USB 2.0 Type-A male plug connects to any standard USB port on laptops, desktops, docks, or hubs
- Dedicated 3.5mm headphone output drives headphones, earphones, powered desk speakers, or a line input on a mixer
- Separate 3.5mm mono microphone input accepts standalone TRS microphones, lapel microphones, and two-plug desktop headsets
- Third 3.5mm jack is a 4-pole combined port for single-plug headsets carrying audio and voice together
- Combined port follows CTIA wiring only; OMTP headsets need a converter, which Mascom International stocks separately
- Headphone output and combined port can run at the same time, letting two people listen to one machine
- Cable length measures 15 centimetres, short enough to sit flat against a laptop without blocking neighbouring ports
Manual Controls and Status Indication
- Rotary volume wheel adjusts output level in hardware, with no keyboard shortcuts or on-screen sliders needed mid-call
- Independent microphone mute button silences your voice instantly, useful when a boda rider passes your window
- Separate speaker mute button cuts playback without touching the volume setting you already dialled in
- Buttons sit on the top face where fingers find them without looking, which matters during live calls
- LED indicator confirms the adapter has power and the computer has recognised it as an audio device
- Hardware controls keep working across Windows, macOS, and Linux without any configuration panel or utility application
Device and Operating Compatibility
- Works with Windows 11, Windows 10, Windows 8.1, and Windows 7 with no driver installation required
- macOS and Linux distributions including Ubuntu, Debian, and Fedora recognise it through the USB Audio Class standard
- PlayStation 4 and PlayStation 5 read the adapter as a USB headset device for game and party chat
- Raspberry Pi boards, Chromebooks, Android TV boxes, and Windows tablets with a spare USB port also work
- Android phones and tablets connect through a USB-C to USB-A OTG adapter, sold separately at Mascom International
- PlayStation 3 does not pass audio over USB, so the adapter will not produce sound on that console
- Hot-swappable design lets you plug in or remove the adapter while the machine runs, with no restart
Build Quality and Daily Durability
- Moulded plastic housing measuring 74 x 34 x 15.5 millimetres resists the knocks of daily bag transport
- Tinned copper conductors with shielding keep mains hum and mobile phone interference out of the audio signal
- Black finish hides the dust that settles on desks during Nairobi's dry August and February months
- Strain relief where the cable meets both ends reduces the flexing damage that kills most cheap dongles
- Draws power from the USB port alone, so no wall adapter, no battery, and no extra socket needed
- Model number 40964 is printed on the housing, letting you verify the exact unit against UGREEN documentation
Package Contents
- UGREEN CM129 USB external stereo sound adapter in black, model 40964
- Attached 15cm USB 2.0 Type-A cable, permanently fixed to the housing
- User manual covering port markings and setup steps
- Mascom International 6-month warranty card
Note:No OTG adapter or USB extension cable ships with this model. Mascom International stocks USB-C to USB-A OTG adapters and USB extension cables separately at our Kimathi Street counter for buyers connecting Android phones or floor-standing desktop towers.
Warranty
The UGREEN CM129 carries a 6-month Mascom International warranty on manufacturing defects, covering the controller, the three jacks, the volume wheel, and the mute buttons under normal use. Claims are handled directly at our Nairobi CBD service desk on Kimathi Street. Damage from crushing, liquid, or cut cables falls outside the cover.
Where to Buy the UGREEN CM129 in Kenya
UGREEN CM129 USB to Triple 3.5mm External Stereo Sound Adapter is available now at Mascom International, located at Old Mutual Building, First Floor Room 4, Kimathi Street, Nairobi CBD. Walk in Monday through Saturday, 9:00 AM to 7:00 PM, and test the adapter on your own laptop or headset before you pay. Available colour: black.
Order through any of the following:
- Phone/WhatsApp: +254 708 852 521
- Email: info@mascomintl.com
- Website: www.mascomintl.com
Mascom International ships the UGREEN CM129 across all 47 Kenyan counties with pay-on-arrival delivery, so you only pay when the adapter reaches you. Nairobi and its environs receive same-day delivery. All other major cities and towns, including Mombasa, Kisumu, Nakuru, Eldoret, Nyeri, and Kakamega, receive next-business-day delivery. Mandera, Wajir, Marsabit, Lamu, Tana River, and Turkana receive delivery within 2-3 business days.
Every unit is covered by the 6-month warranty above, with claims coordinated at our Nairobi CBD service desk. Buyers across Kenya rely on Mascom International for accurate specifications, current Kenyan pricing, and after-sales backing on every accessory we stock.
