1.First Automatic pairing. 2.Bluetooth 5.0 3.Earphones with a charging box. 4.drive: 15mm 5.Impedance: 32 ohms 6.Bluetooth version: Bluetooth v5.0 + EDR 7.Power level: Level II 8.Output power: 30 MW 9.Bluetooth distance: 12 m barrier 10.Frequency response: 20Hz 20000 11.working voltage range: 3.0 V-4.2 V. 12.Microphone sensitivity: -42dB 13.with A2DP / AVRCP high quality stereo audio transmission and remote control protocol 14.powerful noise cancellation circuit (active noise reduction) 15.talk time is about 2-3 hours 16.music time is about 2-3 hours 17.Double ears can make phone calls, both ears can hear sound. 18.With high quality speaker, deep Stereo bass sound quality. 19.Powerful noise de-noising circuit (active noise reduction) 20.listening to music, support music and phone call. 21.Caller ID, the last call back, English voice prompts, boot, pair, shut down the phone power will be low voice prompts. 22.phone power display, 23. Touch control.