Extended Playtime: Built-in Li-Ion rechargeable battery powers up to 7 hours of playtime at 50% volume. Recharge in 3-4 hours with the included micro USB cable, you'll be able to enjoy your favorite songs whenever (and wherever) you please. *In the same time, we are always dedicated to provide good quality products and service, if you are not satisfied with our portable Bluetooth speaker for any reason, contact us anytime we will always be here to help you. Rest assured to buy. Unique Suction Cup Design and Multi Function Button: The T7A waterproof Bluetooth speaker comes with an in-built suction cup that can attach to any smooth surface, including desk, wall, window, back side of phone or tablet. The easy to use multi-function buttons allow you to amplify the atmosphere and vitality of the party. You can easily change the track, volume, pair, switch fm and music with a simple operation. Waterproof and Anti-Damage: IP7 waterproof protection safeguards against rain, snow, and spills, our portable speakers can be fully immersed up to 3ft for about 30 minutes underwater. The silicone cases and interface design ensure shockproof and dustproof, make the wireless speakers have better internal protection. A good choice for summer days, poolside or beach party, keep the music on your way. LED Colorful Light Show: Our T7A Bluetooth speaker not only a speaker but also as a unique night theme light, the light color will automatically change with the rhythm of the music. While you enjoy music, gradient lights would truly bring you party atmospher. If using night theme light, you could just open it as a led light without use it to play music. 360°HD Stereo and Dual Pairing Function: With 5W driver and passive radiators, Rulefiss shower speakers delivers surprisingly loud clear stereo sound even under showering noise. If you can purchase two speakers at the same time to truly enjoy the surround sound of a movie theater by using the Dual Pairing function, it's an auditory experience that's truly unparalleled.