Wireless connection: Bluetooth 4.0Active passive: activePower supply: built-in 1200mAh lithium batteryUSB power adapter above DC5V-500mAUSB specification: USB2.0, compatible with USB1.1Frequency response: 80Hz. 18KHzSpeaker type: portable bluetooth speakerSpeaker system: monoSpeaker unit: 1.5 inches + extra large laceSuspended Siamese Passive RadiatorAdjustment method: button.Output power: 42 3WProduct size: 86x97x38mm