New Backpack Laptop Simple Business Travel Oxford Cloth Waterproof Expandable Size Multi-Section & USB Power Charger Extension Up to 17″ Laptop Size – Gray

Ear pads type: on-earConnection type: wireless (Bluetooth 5.0)Emitter head diameter (mm): 32Type, acoustic: closedBluetooth pairing: up to 10 metersContinuous working time: up to 10 hoursStandby time: up to 250 hoursFull charge time: 2.5-3 hoursFrequency response: 10Hz-22KHzSensitivity: 102dB