General SpecificationsOutput power 20 Watt Music playing time 12 hours DimensionsDimensions 18.1 x 6.9 x 7.4 centimeters Weight 0.54 kilogram Control and Connection SpecificationsBluetooth version 4.2 BatteryBattery capacity 4.800 m Ah Charging time 2.5 hours FeaturesAuto power off Yes Bluetooth Yes Waterproof Yes