The Knox KN-BTAS8 8-inch music player and PA system offers a wide range of features that make it versatile enough for use at parties, backyard BBQs, or more formal settings like public speaking engagements. The KN-BTAS8 provides 25-watts of power for crystal clear audio and the rechargeable battery offers 4-6 hours of continuous use. There's a wireless mic included, too, so you don't have to worry about tangled cords when you're setting up or storing the speaker system. The back of the KN-BTAS8 has a number of input options including an SD card slot and a USB port so you can play digital music stored on a flash memory card or a portable device like a smartphone or tablet computer. Additionally, this system has Bluetooth functionality so you can pair portable devices with it and stream music wirelessly. Wireless microphone included with echo and non echo options Bluetooth can play music from any device 25 Watt crystal clear sound Rechargeable battery lasts 4-6 hours of continues play SD Card, USB and RCA Inputs Aux input: 1/4-inch input for guitar play Materials: Electronics Brand: Knox Model: KN-BTAS8 Dimensions: 18.5-inches high x 12-inches wide x 12-inches long Weight: 19.5-pounds For state-specific electronic recycling and disposal information, please click here.