NICEWIN M21 Black Mini Wireless Earbuds Bluetooth 5.3 Headphones (Dark)

Main ParametersBluetooth program: Bluetooth V5.3Product speaker: high quality speakerStandby time: 120 days +Working time:3-4 hours the charging compartment can charge the headset 4 times +Charging time: about 1 hourWaterproof:IPX5Communication distance: 12-15 meters without obstaclesCharging compartment interface: Type-C charging portHeadset battery capacity: 40 mAhHeadphone compartment battery capacity:300mAhProduct matching: headset + charging cable + color box + manualFunction Operation.Pause/Play: ClickUp / down the track: double-click (left and right ear one up one down)Volume plus / minus: three clicks (left and right ear a plus a minus)Call SIRI: Long press