2" Clear sound portable speaker is easy to take with you anywhere. Wirelessly stream audio from an enabled Bluetooth device. Secure and simple pairing for easy user friendly operation. Sing along with your favorites using the microphone input. Play audio via Micro SD card and 3.5mm Auxiliary input. Built-in Lithium rechargeable battery. Frequency response: 80Hz-18kHz. Input power: 5V 1A. Output power: 2 x 10W. Includes USB cable.