[Bluetooth Waterproof Speakers] AOPERK Wireless Bluetooth 4.0 Waterproof Outdoor/Shower Speaker, with 7W Powerful Drive & Bass Enhance Radiator (Black) Powered by cutting-edge Bluetooth 4.0 technology, power saving, faster and more stably transfer, outstanding connection range of up to 33 feet. Waterproof rated IPX6 ensure 100% protection against the splashed water, suitable for the outdoors, shower and other wet environments. Two 40mm total 7W premium acoustic drivers and a built-in proprietary passive bass radiator delivers a full-range listening experience. Built-in 1700mAh Li-ion rechargeable battery for up to 8 hours of wireless play on a single charge when music streaming or hands-free calling. NFC (Near field communication) technology for easy and instant connection. (If your bluetooth audio device has NFC function)