Bluetooth: V5.3Bluetooth Name: Skyzer SZAU600Working Distance: ≤15mSpeaker Transmission Frequency: 2.402gHz~2.480gHzSupply Voltage: 5V ⎓ADrivers Sensitivity: 80db±3dbDrivers: 20W (3 inch)Charging Time: 3 HoursPlaying Time: 6-8 Hours (at 70% volume)Battery Capacity: 5000mAh/3.7VOperation Mode: MFB Button, Encoder KnobProduct Size: L240W85H155mmProduct Weight: About 1.7kg Skyzer Skyzer Clear Box True Wireless Bluetooth Speaker - Black