Hapyia Waterproof Wireless Bluetooth Speaker - Black TWS Function: Support two speakers paired to one bluetooth device at once so customers can enjoy true 3D stereo sound when watch movies or listen music ect, excellent for big parties and home theater.(WARM reminder: ONE item/package -- please purchase two S777S to enjoy 3D stereo sound). High Quality Crystal Clear Sound: Distinct mids and highs from our two precison acoustic. 10 wattts (2*5W) drivers offer full high-definition surround sound and provide strong bass without distortion even at highest volume. Bluetooth CSR4.0 Technology: Connects faster, more stable, compatible with all your Bluetooth-equipped devices including iPhone 7 plus, iPad, Samsung Galaxy, Echo Dot ect. The outstanding bluetooth connection range of up to 33ft/10M. Extra Long Playing Time: Built-in 7000mAh rechargeable battery to ensure 20-22 hours music/ phone time. Also it can use as Power Bank to charge your other devices, which will be great useful for outdoor activities. WE GUARANTEE YOUR SATISFACTION: Comes with 30 days money back guarantee and 18 month worry-free warranty and friendly customer service, which make your purchase absolutely risk-free. What you get: 1pcs waterproof bluetooth speaker, user manual, 3.5mm audio cable, USB charging cable, Hook.