Expower Waterproof Wireless Bluetooth Speaker with Superior Bass Sound Built-in 7000mAh Power Bank - Black Bluetooth CSR 4.0 - Connect speaker with a wireless range up to 33 feet away from your bluetooth devices.compatible with all the fashionable smartphones in the market.additionally the 3.5mm Aux-in to connect directly any non-Bluetooth device. Power Bank & Long playtime -Besides up to 20 hours playtime ,also it is a 7000mAh power bank to quickly recharge your smartphones ,tablets,desktops through its USB port, No doubt about the power absolutely. Portable Design -The speaker can be easily connected to the built-in Bluetooth or with an Aux cable,A strong and durable body with silicone layers on top and bottom to provide it a firm grip on most surfaces perfectly. Built-in Microphone - Easily take hands free calls through its built-in high quality microphone. Meanwhile allow you to use your speaker as a speakerphone in meetings or chatting. Indication light will show battery level when connected to your device. Water Resistant - It is Splash-proof bluetooth speaker,but don't soak it into water directly in any case,the speaker can be used in outdoor,indoor, camping and hiking. Have a great musical experience for you in anwhere.