Youmoon Solar-Powered Portable Wireless Bluetooth Speaker 5W IPX4 Waterproof Silicone case and Stainless Steel Bracket for Outdoor with 6 Hour Playtime and 20 Hour Call Duration (Black) High efficiency mono crystalline Solar panel with internal 1200MAH Li-ion battery. Daylong Playtime, Fast Recharge - Internal battery provides 6 hours for listening long into the night, and 20 hours call duration Charged at sunny 80-120MAH / hour. IPX4 rated - Rugged ,Dust-Proof and Water Resistant make it suitable for outdoors . Silicone case and stainless steel bracket, 360 rotation, great for any outdoor activity, or just lounging by the pool. Latest Bluetooth Technology - Connect your device in 3 seconds; Outstanding connection range of up to 33 feet. Full,High-Def Sound - Enjoy an impressively crystal clear sound quality and robust bass realized through a 5W audio driver and passive subwoofer.