Driver: 15mm 2. Impedance: 9 OHM 3. Bluetooth version: Bluetooth 5.0 4. Output power: 40mW;Battery capacity 45MAH , charging box is 300mh . 5. Bluetooth distance: 10 meters 6. Frequency response: 20-20000Hz 7. Operating voltage range: 3.0V-4.2V 8. Powerful noise de-noising circuit (active noise reduction) 9. Charging time about 1-2 hours . 10. Talk time is about 2-4 hours (a pair of earphones use together ),music time about 2-4 hours (a pair of earphones use together ) , Charging box can charge for the earphons about 3-5 times. 11. Standby time is about 120 hours. Package Includes: 2* Mini Bluetooth Earphones 1* Charging Box 1* USB Charging Cable 1* User Manual
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