Product name: TWS Bluetooth headset;Product model: T911Product material: ABS + electronic components + lithium battery;Power supply mode: USB;Main control scheme: V5.0+EDRSupport protocol: HSP1.2, HFP1.6, A2DP1.3, AVRCP1.5Sensitivity: ≥90dbWorking frequency: 20-20KHZWorking voltage: earphone 5V/50MA; charging box: 5V/1.5ACharging time: 1HWorking hours: 3HStandby time: 480HWorking distance: 10MSingle ear battery capacity: 50mAh;Battery box battery capacity: 500mAh;Number of charging the headset: 2-3 times