Yinyol Waterproof, Dustproof, Anti-scratch, Shockproof Wireless Portable Bluetooth Stereo Outdoor Speaker with 4000mAh Power Bank Function, Micro SD Card/TF Card,Built-in Mic.(Black) Waterproof, Dustproof, Anti-scratch, Shockproof, High temperature Resistant Speaker, waterproof grade IP44 , not available to totally immersed into water With 4000mAh battery,power bank function,charge for your electronic device anywhere anytime. Bluetooth 4.0 and CSR chipset provides range up to about 30 feet. HiFi and clear loud sound output, Built in microphone allows you to answer calls while listening to music Battery could support play music time: 5-12 hours when speaker is full charging. Material: ABS with rubber oil,Bluetooth range: 15 metres