AXESS SPBT1033 Portable Bluetooth Indoor/Outdoor 2.1 Hi-Fi Cylinder Loud Speaker with Built-In 4" Sub and FM Radio, SD Card, USB, AUX Inputs in Gray A2DP Wireless Bluetooth streaming, play music from smartphone, tablet, notebook, or other portable device 4-inch Subwoofer with 7W and 4 Ohm output; 2-inch horn with 2W x 2 and 4 Ohm output Over 30 feet operating range With micro SD card support, FM radio, and Aux line-in (3.5mm); side panel control for volume; strap for easy portability 1000 mAh built-in rechargeable lithium ion battery