Headset wireless bluetooth headset

Material: Plastic Product attributes: Built-in battery Packing size: 200*220*90(mm) Transmission distance: less than or equal to 10m Battery capacity: 300mAh Charging voltage: DC5V Speaker diameter: φ40mm Impedance: 32Ω Working time: playing music 4-6h, talk time 8-10h Bluetooth version: 4.0 Microphone: Outside Rated power: 100mw Working voltage: DC3.7V Frequency range: 20-20KHz Headphone instruction Turn on: Long press the key for 3 seconds until the red and blue lights flash alternately, then let go Shutdown: Press and hold the key for 3 seconds until the red light flashes, then let go Pairing: blue light flashes slowly Answer the call: press the key to hang up Adjust the volume: long press "+" to increase the volume, long press "-" to decrease the volume Previous/Next Song: Quickly press "◥"/"◣"