Product Description: Color: black Waterproof grade: IPX4 (Not for using under water or swimming) Buttons/Interfaces: ON/OFF Button, 1 x DC 2.5mm USB Interface, Play/Pause, Previous/Volume-, Next/Volume+, Talking key. Working Voltage: DC 5V 2.5mm Working Distance: within 10m Built-in Lithium Battery: not removable chargeable lithium battery. (with USB cable for charging) Function: microphone, handsfree answer and call, wireless bluetooth speaker playing audio files, super sucker function, speaker volume will display on screen while connected with iPhone. Great sound and improved volume control for premium music experience. Built-in mic for you to answer phone call, can switch songs and control volume. With a suction cup that can be attached to wall or any flat surface, also can suck on back side of iPad or other tablet become a stand. Auto Pairing feature for easy connection. Package content: 1User manual 1Water Resistant Bluetooth Speaker 1USB charging cable(AC wall charger not included) 1Soul Cole Stylus Pen