TWS I13 Wireless Headphones Bluetooth Earphone Stereo Earbud Headset With Charging Box For All Smartphones

Drive: 15mm 2. Impedance: 32 OHM 3. Bluetooth version: Bluetooth v5.0 + EDR 4. Bluetooth frequency band: 2.4 GHz 5. Power level: CLASS II 6. Output power: 30 mW 7. Bluetooth distance: 15~20 meters barrier-free 8. Frequency response: 20-20000Hz 9. Operating voltage range: 3.0 V-4.2 V 10. Microphone sensitivity: -42dB 11. High-quality stereo audio transmission and remote control protocol with A2DP/AVRCP 12. Powerful noise reduction circuit (active noise reduction) 13. Charging time is about 1 hour (charging power indicator: red light is on, fully charged: red light is off (blue light).) 14. Product size: 53×44×21mm 15. The net weight of the product is about 32 grams 16. Play for about 150-180 minutes 17. Standby time is about 48 hours 18. Battery capacity 35 MAH (charging room 350 MAH) 19. Charging power supply: DC5V power supply [lighting interface] (computer USB port, mobile phone charger, car charger)