Features: 1. Embedded ARM926EJ-S core, 4KB lcache and 4kB Dcache; 2. Support stereo codec; 3. Support HFP, HSP, A2DP, AVRCP, and SPP configuration files; 4. Multi-point HFP and A2DP; 5. Support voice prompts, the operation is simpler; 6. Support 300 mA fast charge and over-discharge protection; 7. Support audio equipment with audio input to realize wireless audio reception and transmission; 8. Support automatic search and connection of Bluetooth devices to achieve wireless audio transmission; 9. Built-in AEC noise cancellation and ANC noise cancellation circuit, stereo sound, better sound quality; 10. Built-in enhanced signal transmission circuit, faster connection, more stable and continuous tone; 11. Compatible with dual lossless audio formats; 12. Support AUX OUT, Earphone; 13. Automatic memory connection function, simpler operation and more convenient connection; 14. The product connection is simple, without any driver and APP. Notice: Actual color may be slightly different from the image due to different monitor and light effect. Please allow 1-3cm deviation due to manual measurement. Adapter Support protocol: A2DP, AVRCP, HFP, SPP HID Receiving working current: 43MA Transmitting working current: 60MA Standby current: 18MA Built-in battery: polymer 600MAH Charging current: 300MA Life time: 8H Bluetooth distance: 10M (open place) Charging method: Micro USB 5V/0.5A Output connection mode: 3.5MM stereo interface Input connection mode: 3.5MM stereo interface Compatible: Android, IOS system, and all Bluetooth-Compatible audio equipment, audio equipment with audio input interface USB cable Cable length: 0.25 meters Interface: Android Color: As the picture shown Function: data transmission, fast charging includes: choice 1: 1 x transceiver 1 x audio cable 1 x 3.5MM audio cable 1 x USB cable 1 x manual choice 2: 1 x USB cable