1. Experience seamless audio streaming with the A2, a versatile Bluetooth 5.1 audio adapter. 2. This compact device acts as both a receiver and transmitter, making it ideal for a variety of audio setups. 3. It's equipped with a 3.7V 250mAh battery, ensuring long-lasting performance for all your audio needs. 4. Package includes a 3.5mm audio cable and an cable, providing flexible connectivity options. 5. Whether you're enhancing your home entertainment system or adding wireless functionality to your car audio, the A2 offers reliable and high-quality audio transmission. Specifications: product model:A2 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 Greater than10m Frequency response:20Hz-20KHz Signal-to-noise ratio: equal 75db Audio Performance: AAC decode Interface type:Aux in/out 3.5MM audio*1 Basic function:Bluetooth receiver/Bluetooth transmitter Use method:Plug and play Support equipmect:Mobile phone/tablet/PC/TV/speaker/amplifier/headset/projector/Mixer and other equipment with audio input/output interfaces Power supply mode:Type-C interface Input parameters:DC 5V=500mA (1A max) Battery capacity:3.7V/250mAh 0.925Wh Using the length:About 4-6 hours (Charging time: about 1.5 hours) Colour:black Material:ABS The actual product may have slight color difference or difference, which not affect the use Package Contents: 1 * Bluetooth audio adapter 1 * 3.5mm audio cable 1 * audio cable 1 * USB charging cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.