[Portable Size Bluetooth Audio Adapter] The Bluetooth receiver adapter connected with two bluetooth devices at the same time,working range up to 33ft without obstacles.It ideal for Home stereo, speakers, headphones, earbuds, audio music streaming sound systems, car stereo systems, airplane in-flight entertainment, PCs, MP3, MP4 etc. [The Easiest to Use] It really doesn't get much easier than the Bluetooth receiver, so if you have a 3.5-millimeter jack and don't need radio stations, this one is definitely the easiest way to go. Simply plug it into your car's auxiliary input to enjoy hands-free calls with its built-in mic As . [24H Super Long Battery Life] The Bluetooth transmitter has a 24-hour battery life and can fully charge the device in 1.5 hours. Once fully , it can support up to 16 hours of use. And The Bluetooth adapter supports charging while using, it is your good partner for long-distance travel. [Advanced Bluetooth 5.3 Technology] The Bluetooth receiver has an Cutting-edge Bluetooth 5.3 chip that improves the transmission delay and connection defect problems of the old Bluetooth 5.0 version and offers you a faster, more stable and smarter connection with less sound quality loss. [Clear Sounds] Aux Bluetooth Adapter is equipped with high-quality microphones and upgraded CVC8.0 technology,which can filter out echoes, background noise,current sound and other distractions making the conversation between both parties clearer and comfortable. Colour:Silver Material:ABS Package Contents: 1 * Bluetooth Aux Adapter 1 * Audio Adapter 1 * Audio Cable 1 * USB 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.