Wireless Bluetooth Speaker, Portable Stereo Outdoor Sports Lightweight Round Design Waterproof for Bathroom, Pool, Boat, Car, Beach, Outdoor Etc Specially designed and manufactured to leave only the greatest impressions, it provides crisp and high quality sound that will surprise everyone. Get rid of big, inconvenient speakers All you have to do is enable the Bluetooth on your device and connect it to the speaker fast and easy; Working Voltage:3.7V,Built-in 520mAh Lithium Battery,with 5 hours playing time; IF Card for quick playing music;connect your phone or tablet from up to 33 feet wireless range Bluetooth+EDR Wireless Transmission Technology, Adjust the rate stability of wireless data transmission, anti-interference, Both easy to use for indoor and outdoor,Wireless music makes you enjoy the pleasure of playing experience Small dimensions and the cylindrical shape you can carry a speaker always with you. Put in your bag and use it whenever you want to create a festive, unique environment hassle free!