Feature: 1. 2 in 1 Adapter: The appearance is exquisite. Using Bluetooth compatible 5.0 chip design, strong compatibility and stability. Bluetooth compatible receiver (RX), Bluetooth compatible transmitter (TX) 2 in 1 design, toggle switch to switch quickly. 2. LED Digital Display: Equipped with HD LED digital display, working status and Bluetooth compatible mode are clearly visible. Built in digital to analog chip, supports 6 signal interfaces of digital optical fiber, coaxial, AUX, RCA, U disk, and memory card. 3. NFC Function: Upgrade the NFC function, the mobile phone can connect with one button. Cool breathing light, red blue color, soft and not dazzling. Support Format: MP3/WAV/WMA/APE/FLAC/G729/M4A/ALAC/AMR/DTS/MIDI/G726/MTY. 4. Rechargeable Lithium Battery: Built in 500mAh rechargeable lithium battery, long battery life. Support USB (U disk), memory card playback and transmission. Support 5‑8m / 16‑26ft infrared remote control, all kinds of functions are readily available. 5. Compatible Devices: For Android, for iOS system mobile phones and PAD, active speakers, power amplifiers and Bluetooth speakers or earphones that support A2DP protocol are connected for use. Built in HD microphone, support wireless music listening, hands free call, navigation. Specification: Item Type: Bluetooth Transmitter Receiver Material: Plastic Model: M8 Bluetooth Version: Bluetooth V5.0 Support Protocol: RX: A2DP AVRC TX: A2DP Working Frequency: 2.402GHz -2.480GHz Power Class: Class II Sensitivity: -85dBm<0.1%BER Signal to Noise Ratio: ≥90dB Distortion: ≤0.1% Interface Type Input: 3.5mm AUX+RCA+Optical+Coaxial+USB+Memory Card interface Output: 3.5mm AUX+RCA Support Format: MP3/WAV/WMA/APE/FLAC/G729/M4A/ALAC/AMR/DTS/MIDI/G726/MTY Screen Size: Approx. 32x14.5x7mm / 1.26x0.57x0.27in Working Current: ＜40mA Built in Battery: 500mAh lithium battery (included) Remote Control Battery: 1 x CR2025 Charging Current: About 500mA Charging Time: About 1.5 hours Life Time: RX about 10H, TX about 8H Bluetooth Distance: ≤10m-15m / 33ft- 49ft (open place) Charging Method: Type-C 5V-0.5A Compatible Devices: For Android, for iOS system mobile phones and PAD, active speakers, power amplifiers and Bluetooth speakers or earphones that support A2DP protocol are connected for use . Package List: 1 x Bluetooth Compatible Adapter1 x Type C Charging Cable1 x 3.5mm AUX Cable1 x Red and White RCA Cable1 x English Manual1 x Remote Control