Mpow Buckler Portable Wireless Bluetooth Shower Speaker Waterproof with Mic, Hands-free Calling Function for Shower, Outdoor Activities Advanced Bluetooth Technology: Connect your device very fast, consume less energy and deliver crystal clear sound. Rated IPX4 Level: Large area of Sealed Silicone Cover Design ensures great Splashproof, Shockproof and Dustproof function, so it can be used under harsh environment (such as, outdoor and shower). Long Playtime, Fast Recharge: Built-in rechargeable1000 mA battery, supports up to 8 hours playing time with a single charge. Recharge only needs 3 hours.