[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. [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! [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. Colour:Black Material:ABS Package Contents: 1 x Bluetooth 5.3 audio adapter 1 x audio adapter 1 x audio cable 1 x 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.