Advanced Connectivity: Experience seamless audio streaming with A2DP/AVRCP support, allowing you to enjoy high-quality wireless music from your TV or car stereo system. Versatile Audio Decoding: Supports both and AAC decoding, ensuring compatibility with a wide range of devices and providing superior sound quality. Flexible Connections: Equipped with both and 3.5mm jack outputs, this adapter can connect to a variety of audio systems and speakers. Compact and Portable: The A4's small size and design easy to carry and install anywhere, providing a perfect audio solution . Specifications: product model:A4 Bluetooth version:V5.1 Support portcol:RX: A2DP/AVRC,TX: A2DP Frequency range:2400-2483.5MHz Sensitivity:-81dBm Less than 0.1%BER Transmission distance:Barrier-free about 10m Frequency response:20Hz-20KHz Signal-to-noise ratio: equal 75db Audio Performance: AAC decode Interface type:Aux in/out 3.5MM audio*1, R/L Basic function:Bluetooth receiver/Bluetooth transmitter Use method:Plug and play Support equipmect:Mobile phone/tablet/PC/TV/speaker/amplifier/headset/projector/Mixers and other equipment with audio input/output interfaces Power supply mode:Type-C interface Input parameters:DC 5V500mA (1A max) Battery capacity:3.7V/800mAh 2.96Wh Using length:About 5-7 hours (Charging time: about 2 hours) Colour:black Material:ABS Due to different batches, there may be differences in product appearance and printed text, which will not affect use Package Contents: 1 * Bluetooth audio adapter 1 * AUX 3.5mm audio cable 1 * 1 to 2 to AUX 3.5mm audio cable 1 * USB-C charging cable 1 * Fiber optic cable 1 * Antenna 1 * Remote control Only above package content, other products are not included. Note: Light reflection and different displays may cause color of item in picture a little different from real thing. The measurement allowed error is +/- 1-3cm.