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Product parameters: Default voice: English Speaker specification: 16MM speaker Speaker impedance: 32 ohms Speaker frequency response: 20Hz～20KHz Horn rated power: 3mw Speaker 1k sensitivity: 111dB Talk time (medium volume): 4h Music time (medium volume): 5h Standby time: 120h Bluetooth chip: Lanxun 5335B (stereo board) Bluetooth version: 5.0 Transmission distance (meter): 10m Power Consumption: 5mAh Input power: 93mW Headphone charging time: 0.8h Headphone battery capacity: 75mAh without protection board Charging time outside the charging compartment: 1.5h Battery voltage: 3.2-4.2v Input headphone current: 5V/100mAh Whether charging is off: off Boot current: 1.2-6.4mAh Charging current: 100mAh Play music power consumption: 7mAh-8mAh Call power consumption: 10mAh Standby power consumption: 4.5mAh Shutdown power consumption: 3uA Low power shutdown voltage: 3.1V Search current: 6mAh-16mAh Low power prompt voltage: 3.3V Key Function: Power on/off: Long press the + button for 3 seconds to power on/off Volume up: Quickly press three times + button volume up Volume down: Quickly press three times - key volume down Next song: Quickly press twice + button to release the next song Previous song: Quickly press twice - release the previous song Play/Pause: Short press the + button to play/pause music Answer/hang up: Short press the + key to answer an incoming call, short press to hang up during a call Reject call: Long press + key for 2 seconds to reject the call