Built-in 52mm driver for Hi-fi stereo sound, S15 bluetooth speaker provides crisp, full-bodied music with impressive volume. S15 bluetooth speaker with 5000mAh rechargeable lithium battery provides up to 8 hours playback time. With solid aluminum alloy case provides smooth touch. And the touch control design makes the Bluetooth speaker easy to switch the mode, adjust the volume, change the songs and more. Equipped with speakerphone for conveniently answer a call. Connect this wireless speaker with your device and you can take this mini portable speaker anywhere. Designed in advanced technology, the Bluetooth speaker compatible with most Bluetooth enabled devices. You can easy and fast pairing with your favorite device.