
UGREEN-OS 2-in-1 Bluetooth 5.0 Transmitter and Receiver /CM144
The UGREEN CM144 (item 70158) is a 2-in-1 Bluetooth 5.0 audio adapter that works either as a transmitter (TX) or as a receiver (RX). It connects through a 3.5mm AUX jack or an optical (Toslink/SPDIF) connection, supports aptX, and runs on a built-in rechargeable battery.

Transmitter mode (TX): Connect a device without Bluetooth, such as a TV or a PC, to the CM144 and send its sound to Bluetooth headphones or a Bluetooth speaker. In this mode it can pair with two Bluetooth headphones at the same time, so two people can listen together.
Receiver mode (RX): Connect the CM144 to wired speakers or a home stereo, then play music to it from your phone over Bluetooth. This gives an older sound system wireless playback without replacing it.
Optical and 3.5mm connections: Besides the 3.5mm AUX jack, the CM144 has optical (Toslink/SPDIF) connections. This lets it work with TVs and audio devices that only have an optical output, as well as with devices that have a 3.5mm jack.

Battery power: The built-in rechargeable battery gives up to 15 hours of use per charge, and the adapter charges through its Micro-USB port (5V). Because it runs on battery, it does not need to stay plugged in while you use it.
Good to know
The range of up to 10 m is a maximum; walls and other obstacles shorten it.
Technical Specifications
| Model | CM144 |
| Item No. | 70158 |
| Bluetooth | 5.0 |
| Modes | Transmitter (TX) / Receiver (RX) |
| Codec | aptX |
| Audio Connections | 3.5mm AUX, optical (Toslink/SPDIF) |
| Range | Up to 10 m |
| Battery | Built-in rechargeable, up to 15 hours per charge |
| Charging Port | Micro-USB, 5V |
| Colour | Black |
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