1. Bluetooth version: Bluetooth v5.0 + EDR 2. Bluetooth use band: 2.4GHz 3. Output power: 30mW 4. Bluetooth distance: 10-15 meters barrier 5. Frequency response: 20-20000Hz 6. Operating voltage range: 3.0V-4.2V 7. Mic sensitivity: -42dB 8. With A2DP / AVRCP high quality stereo audio transmission and remote control protocol 9. Powerful noise de-noising circuit (active noise reduction) 10. Talk time is about 2-3 hours 11. music time about 2-2.5 hours 12. Standby time is about 100 hours