F11 Ear-hook Bone Conduction Wireless Bluetooth Earphone 1. Bluetooth 5.4 chip, fast connection, more stable listening to music and talking, with lower power consumption and higher processing performance. 2. Airbag silicone design, skin-friendly, comfortable to wear, no pinching of ears. 3. Digital microphone HD call and ENC environmental noise reduction processing, effectively filter out the noise brought by noisy environment, making calls clearer. 4. Three-band balance, surging bass, enjoy stereo surround sound. 5. Adopt embedded sound hole design, accurate sound transmission, no sound leakage. 6. Functions: a. Automatically turn on when you take out the charging caseautomatically turn off when you put it in the charging case b. Answerreject calls, playpause, volume updown c. Intelligent voice reminder, caller ID, voice assistant d. Chinese and English bilingual switch e. Clear phone memory 7. Parameters: Chip: Bluetrum 5656A2 Bluetooth version: V 5.4 Transmission distance: 10m Charging voltage: DC5V Charging time: 1 hour Talk time: 2 hours Music time: 2.5 hours Standby time: 3 months Battery capacity: 35 mAh Charging case battery capacity: 400 mAh Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement. Sold by-YJL official store