Smart Touch Color Screen Wireless Bluetooth Earphones 1. Bluetooth chip: 7003D8 2. Bluetooth protocol: HFP, HSP, A2DP, AVRCP 3. Bluetooth version: V5.3 4. Frequency range: 2.402GHz-2.480GHz 5. Transmission distance (barrier-free): about 10m 6. Speaker impedance: 16 ohm 10mm 7. Speaker output power: 5mW 8. Earphone sensitivity: 106dB 9. Frequency range: 50HZ-20KHZ 10. Distortion: less than 1 per cent 11. Signal-to-noise ratio: greater than 90dB 12. Battery capacity: single earphone: 40mAh; charging case: 400mAh 13. Use time: about 6h 14. Standby time: about 120h 15. Charging voltage: DC 5V 1A 16. Charging time: about 1h 17. Charging case screen language switching: Chinese, English, Hindi, Spanish, French, German, Russian, Arabic, Portuguese, Japanese, Korean, Italian, Thai, Vietnamese, Indonesian, Bengali, Urdu, Malaysian, Turkish, Dutch, Swedish, Polish, Burmese, Persian, Greek, Laotian 18. Material: PC+ABS 19. Net weight: about 58g 20. Charging case size: about 6.6 x 5.2 x 3cm Features: 1. Comfortable to wear, sound insulation and noise reduction 2. HiFi ACS panoramic sound, digital sound enhancement technology, 10mm speaker unit, metal composite diaphragm 3. Personalised screensaver switching, with 5 screen displays can be switched at any time 4. Built-in buzzer, when you can not find the headset, you can click on the charging case to find the headset, the headset will emit a beep sound, find more convenient 5. With remote control photo function, connect your mobile phone via Bluetooth, turn on your mobile phone camera and click the photo button on the charging case screen to remotely control your mobile phone to finish taking photos 6. Using Type-C charging interface, about 6h single continuous listening time, about 24h with the charging box total listening time 7. Sensitive touch sensor, convenient operation