Description: 【2 in 1 Audio Adapter】: Transmitter (TX) and receiver (RX) 2 in 1 design, easy to switch. With an LED digital display screen and RGB colorful lights, clear at a glance. 【Stable Connection】: The transmitter receiver uses V5.3 chip design, lossless stereo, low latency, stronger compatibility and stability, 20 meters barrier free stable signal transmission. Compact size, easy to carry. 【Multi Interfaces】: The wireless AUX adapter supports 3.5mm AUX/2 RCA/USB (maximum support 128G)/Coaxial/Optical inputs, support MP3/APE/FLAC/WAV/WMA/ALAC/M4A/AMR and multi lossless audio format. 【Multi Functions】: The audio adapter is fast and easy to connect when the mobile phone is close to it. Dual pairing, the AUX adapter can pair two devices simultaneously, convenient and practical. 1000mAh rechargeable, about 10-12 hours for listening to music, thirty days of standby. 【Wide Applications】: The transmitter receiver can easily support all kinds of audio equipment, suitable for smartphones, tablet, speaker, computers, notebooks, headphones, mixers, TVs, etc. Specification: Product size: 9.95cmx7.5cmx2.45cm/3.92inchx2.95inchx0.96inch Material: ABS plastic Product model: M13 version: V5.3 Main control chip: AC6951C Capacity: 3.7V/1000mAh Full time: about 1.5h Usage time: about 10-12 hours for listening to music, thirty days of standby Transmission distance: barrier free 10-20m Interface type: 3.5mm AUX/2 RCA/USB (maximum support 128G)/Coaxial/Optical/Type C Optical fiber parameters: sampling rate 32/44.1/48/96/192KHz, 24bit Input parameters: DC 5V-1000mA (MAX) Supported protocols: A2DP/AVRCP/HFP/SBC Usage: driver free Package Includes: 1 Audio Adapter 1 AUX Cable 1 RCA Cable 1 Charging Cable