Play music out loud ? anytime, anywhere. The built-in rechargeable battery lets you enjoy your music without the fuss of tangled power cords and inconvenient search of an electrical socket. Advanced Bluetooth technology for wireless playback up to 10 Meters. Built in microphone for hands free calls. Equipped with IPX7 Water and dust proof technology which allows the speaker to be submerged in the water up to 1 meter for 30 minutes. It?s ready for all outdoor activities such as hiking, backpacks, poolside adventures and for continuous music or phone calls in the shower!