Admos AM657 ANC Bluetooth Headphone

Product Description

Brand: ADMOS Model: AM657 Wireless version: bluetooth 5.3 Wireless effective transmission distance: about 10-15M Wireless operating frequency: 2.402 -2.480GHz Wireless working time: 42.85/h (50%volume) Battery capacity: 300mAh Charging time: about 1.5 hours Microphone sensitivity: -42db ± 3db Speaker size: 40mm Vocket rated impedance: 320 ± 15% The rated input power of the speaker: 20MW Speaker sensitivity: 115 ± 3dB Noise reduction depth: 20 ± 3db Noise reduction effective frequency width: 100-500Hz