Advanced Bluetooth 5.3 TechnologyThe 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 SoundsSONRU 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 LifeThe Bluetooth transmitter has a 24-hour battery life and can fully charge the device in 1.5 hours. Once fully charged, 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 AdapterThe Bluetooth receiver adapter connected with two bluetooth devices at the same time,working range up to