1. Power Supply: 3.7V-5V 2. SNR: 90dB 3. THD+N: -70dB 4. Crosstalk: -86dB 5. DNR: 91dB 6. Support Profile: A2DP/AVCTP/AVDTP/AVRCP/HFP 7. LOS: >;15m 8. USB Power Supply: Universal Micro USB 5V Power Supply 9. 3.7V-5V power supply pad: realizing external 3.7V-5V lithium power supply 10. LED indicator: Bluetooth mode, long blue light 3.5mm 11. Stereo Audio Interface: Standard 3.5mm Interface, Output Stereo Audio, Insert Headphones, Connect Power Amplifiers and Other Equipment 12. Product size: 30mm*30mm*5mm/1.18*1.18*0.19'' Packing weight: 5g