This is a waterproof indoor/outdoor wireless speaker with built-in Mic. You will get lost in the music with the wildest sound quality imaginable. Don't let the water stop you from enjoying your favorite music, great companion for home, office, car, beach, poolside, boat, shower room, bathtub, or kitchen. Built-in microphone allows you answer calls while taking shower or doing other things without free hands, easy way to operation. The LP-03 features a very strong Bluetooth connection as well as a supplemental AUX port, TF card. You will have more time to enjoy music with a battery up to 10 hours playing time under 80% volume. Specification: Charging Voltage:DC 5V Battery Voltage:3.7V Battery Capacity:800mA S/N: 65dB Playing time: 10 hours (under 80% vol) Bluetooth range: Up to 30 feet (free space) IPX-6 waterproof Package Contents: GJT LP-03 Waterproof Bluetooth speaker x1, USB cable x1, Aux-in line x1, hook x1, stand x1, manual x1.