Description: It has powerful functions like Bluetooth-compatible receiver (RX), Bluetooth-compatible transmitter (TX), High clearly LED digital display, NFC function, cool breathing light, long battery life, 5~8 meters infrared remote control, high clearly microphone, plug play, etc. The use of Bluetooth-compatible 5.0 technology and low delay chip allows you to enjoy stronger compatibility and stability. It is made of good quality ABS material, durable to use. With built-in digital to analog chip, it supports six signal interfaces of digital optical fiber, coaxial, AUX, RCA, U disk, and TF card. The length of this product is 9.2cm, the width is 6.5cm and the height is 2cm. It is suitable for all devices with audio input and output interfaces, like mobile phone/tablet/computer/TV/amplifier/headphone/projector/mixer/for Android, for iOS system mobile phone/active speaker/Bluetooth-compatible speaker or earphone supporting A2DP protocol, etc. Item Name: Bluetooth-compatible Adapter Material: ABS Model: M8 Color: Black Bluetooth-compatible Version: V5.0 Frequency Range: 2400-2483.5MHz Transmission Distance: about 10m without Barriers Power Supply Mode: Type-C Interface Adapter Battery Capacity: 3.7V/500mAh (Included) Remote Control Battery: 1 x Button Battery (Included) Use Time: about 8~10 Hours Charging Time: about 1.5 Hours Frequency Response: 10Hz-20KHz Power Parameters: DC5V=500mA (2.1A Max) Interface Type: AUX/RCA/Digital Optical Fiber/Coaxial/U Disk/TF Card Basic Functions: Bluetooth-compatible Receiver / Bluetooth-compatible Transmitter / U Disk / TF Card Playback / Infrared Remote Control How to Use: Plug and Play + Infrared Remote Control Support Protocol: RX:A2DP AVRC TX:A2DP Working Frequency Band: 2.402GHz-2.480GHz Sensitivity: -85dBm