Product Features: 1. Bluetooth Version: V5.2 2. Supporting Agreement: A2DP AVRCP 3. Support Dual Stream (TX mode): Support (One Transmitter Connects Two Bluetooth Speakers Or Headphones At The Same Time) 4. Support Bluetooth Headset, Bluetooth Audio, Bluetooth Receiver And Other Equipment 5. Support Multi-point Connection (RX mode): Support Connecting Two Mobile Phones 6. RX Mode With Mic Support Handsfree Calling 7. Battery Type:250mAh Lithium Ion Polymer Battery 8.Code: RX-----aptX Adaptive/aptX HD/aptX/AAC/SBC TX-----aptX Adaptive/aptX HD/aptX LL/aptX/SBC 9.-Receiver Mode For: Car Kit/Wired Speaker/Home Speaker/Power amplifier/Headphone ect... 10.-Transmitter Mode For: TV/PC/Projector/Power amplifier/TV Box /Bluetooth Headphone/Earphone/Bluetooth Speaker ect... Product Specifications: Bluetooth Profile: aptX Adaptive/aptX HD/aptX LL/aptX/AAC/SBC Bluetooth Version: 5.2 Bluetooth Chip: Qualcomm CSR Chip Wireless Work Range: Up to 10m Charging method: USB TYPE-C 5V/0.5A Power Input: DC5V Built-in Battery:3.7V/250mA Li-polymer Battery Working Time: RX>15H, TX>12H Charging Time: About 1.5hours Dimensions (L x W x H): 503513.7mm