UGREEN Bluetooth Adapter CM276 — 3.5mm Jack Wireless Audio Receiver

UGREEN CM276 is a compact Bluetooth 5.0 audio adapter with a 3.5 mm jack that turns wired speakers, headphones or car audio systems into wireless receivers. The device supports pairing with two sources at once, has a built-in microphone for hands-free calls, and a rechargeable battery that provides up to 9 hours of playback and up to 300 hours standby. The adapter is made of ABS and aluminium and is compatible with any device that supports Bluetooth audio output.

Advantages

The CM276 offers Bluetooth 5.0 connectivity, CVC 8.0 noise reduction and a signal-to-noise ratio above 90 dB for clear audio and stable transmission. Its CSR chip and up to 10 m range ensure a reliable connection, while the ability to connect two devices simultaneously allows easy switching between music playback and phone calls. The built-in microphone and compact design make it suitable for in-car hands-free use. Battery charging takes approximately 2 hours.

Suitable for

• Connecting non-Bluetooth car stereos to smartphones for hands-free calls and audio streaming
• Turning wired speakers or headphones into wireless devices
• Portable use with tablets and laptops to stream audio to wired systems

Key specifications

• Manufacturer: UGREEN
• Model: CM276 (product code 70303)
• Material: ABS + aluminium
• Bluetooth version: 5.0
• Frequency response: 20 Hz – 20 kHz
• Interface: 3.5 mm jack (AUX)
• Music playback time: up to 9 hours
• Standby time: up to 300 hours
• Charging time: approx. 2 hours
• Microphone: yes (sensitivity -38 dB)
• Range: up to 10 m
• Compatibility: universal Bluetooth audio devices

How to use

Charge the CM276 for around 2 hours before first use. Plug the adapter into the 3.5 mm AUX input of your speaker, headphones or car stereo. Turn on the adapter and enable Bluetooth on your source device, then pair with "UGREEN CM276" or the indicated device name. If two devices are paired, play audio from one device and receive calls from the other; switch between sources automatically when required. After use, turn the adapter off to conserve battery.

Usage recommendations

For best performance, keep the paired devices within 10 m and avoid obstacles that block the Bluetooth signal. Regularly charge the battery to maintain optimal playback time, and ensure the AUX connector is clean and securely connected to reduce audio interference.