Novel and elegant appearance, equipped with 5 control buttons & 1 power switch. Long playback time on one single full charge. Bluetooth 4.0 technology, play wireless music within 10 meters, it will show stable performance. Adopt double full-frequency loudspeakers (2 * 40mm 4Ω 3W) with heavy bass diaphragm & separate loudspeaker cavity. Play MP3/WAV music files from external TF card, USB disk, or you can connect a AUX audio cable (not included) to play the music in your devices. With built-in microphone, connect the speaker with your cellphone via bluetooth and make a hands-free call. Universal compatibility for iPad / iPhone / Samsung / HTC / Nokia and other bluetooth-enabled devices.