Features 1.[Hands Free Calls]: The bluetooth receiver built in microphone, with speakerphone and high definition calls, driving is safer when you make call while driving without taking your hands off the wheel. 2.[Strong Performance Chip]: The bluetooth adapter adopts for Qualcomm CSR8645 main control chip, Bluetooth5.0 provides high quality wireless sound performance, support aptX lossless decoding technology to make the output sound quality up to HiFi standards 3.[600mAh Battery]: The HIFI music receiver built in 600mAh lithium battery, support charging while using, and about 1 to 1.5 hours to fully charged, with 25 to 30 hours endurance. 4.[HIFI Sound Quality]: The bluetooth music receiver compatible with all kinds of old sound attack and playback equipment, with double antenna, signal strong change and no delay, you can enjoy CD like sound quality. 5.[Wide Application]: The bluetooth AUX adapter has widely applicability, can connect the car speaker, listen to lossless music, can also connect the desktop loudspeaker, improve the happiness at home. specificationItem Type: Bluetooth Receiver Material: ABS Size: Approx. 7.6 x 6.4 x 1.3cm / 3.0 x 2.5 x 0.5in Bluetooth: 5.0 Bluetooth Chip:for Qualcomm QCC Built in Polymer Lithium Battery: 600mAh Charging Time: 1.5 to 3 Hours Bluetooth Distance: Approx. 50m / 164ft Maximum Output Power: 50mW Interface: 3.5mm PackageList1 x BluetoothReceiver 1 xSound Cable 1 x RCA Cable 1 x USB Cable 1 x User Manual