Roypow 10W Ultra Portable Bluetooth 4.0 Wireless Speaker With Enhanced Bass For Cellphones Tablets Computers Laptops Red Incredible Premium Sound: Experience your tunes in high definition, surprising fullness and robust bass through dual precision full range drivers (total 10W), outclassing other similar-sized portable speakers. Portable & Ultrathin: High-grade Aluminum Alloy Housing, only 1.1 inch thickness and 9.9 oz weight, so you can stream your music anywhere. Broad compatibility: Latest Bluetooth 4.0 Technology, compatible with all Bluetooth-enabled devices (2.1 and over). 3.5mm audio port for non-Bluetooth devices. Easy bluetooth connection: Automatically connected to the last-connected device. Outstanding connection range of up to 33 feet. Built-in microphone for hand-free call. Long play time: 8-12 Hours play time, play from sunrise to sunset in a single charge.