UGREEN Bluetooth audio adapter UGR1207BLK Bluetooth 5.1 with 3.5mm AUX output

UGREEN Bluetooth 5.0 transmitter/receiver (model CM523) is a compact wireless audio adapter with a 3.5 mm mini-jack and USB power. The 2-in-1 device works as a transmitter to send audio from a TV, computer or console to Bluetooth headphones or speakers, and as a receiver to make wired headphones or speakers wireless. It supports Bluetooth profiles A2DP, AVRCP, HFP and HSP and transmits audio using SBC and AAC codecs with stable signal up to 10 m. The adapter is supplied with a 3.5 mm audio cable and comes in black.

Advantages

The adapter provides flexible 2-in-1 operation: use transmission mode to connect non-Bluetooth sources to wireless headphones or speakers, or reception mode to add Bluetooth to wired audio devices. A side button lets you switch modes easily. Bluetooth 5.0 and supported audio protocols ensure reliable streaming with minimal latency within the stated range. The compact design and USB power make it convenient for use with TVs, computers, consoles and car stereos that have a 3.5 mm input.

Suitable for

• Connecting TV, PC, Nintendo Switch or PS4 to Bluetooth headphones or speakers (transmit mode)
• Turning wired headphones or speakers into Bluetooth devices (receive mode)
• Adding wireless audio to car stereos or older speakers with 3.5 mm AUX input
• Portable use where USB power and a short-range Bluetooth link are sufficient

Key specifications

• Brand: UGREEN
• Model: CM523
• Power: USB
• Input/output connector: 3.5 mm mini-jack
• Bluetooth version: 5.0
• Supported profiles: A2DP, AVRCP, HFP, HSP
• Audio codecs: SBC, AAC
• Frequency range: 2400–2483.5 MHz
• Range: up to 10 m
• Included accessory: 3.5 mm audio cable
• Color: Black

How to use

Power the adapter from a USB port, connect the 3.5 mm cable to the source or to the speaker/headphones depending on the selected mode, then switch the device to transmit or receive with the side button. In transmit mode pair the adapter with Bluetooth headphones or speakers from the source device; in receive mode pair the source smartphone or tablet with the adapter so it can route audio to wired speakers or headphones. Follow device pairing prompts and ensure both devices are within the typical 10 m range for stable operation.

Recommendations

For best performance place the adapter in a clear line of sight from the paired Bluetooth device and avoid large obstacles or sources of interference. Use USB power from a stable port and keep firmware or device Bluetooth settings updated for optimal compatibility.