Trolley speaker. • 2pcs 3” full range drivers and 10” subwoofer • 2-way acoustic design • Crystal and classic sound, powerful bass by 10” subwoofer • Elegant design with simple exterior • Unique metal grill design • Bluetooth 4. 2 version • APP on smart devices for easily multi-function control • Bluetooth operation range up to 15 meters • Plug & play USB card reader • USB reader supporting MP3/WMA dual formats decoding • Uninterrupted digital FM working on PLL technology • FM storage up to 100 stations • Voice recording and playback • Wireless microphone included • Internal high capacity qualified plumbic acid battery • Over 8 hours playing time after one charging • Fluorescence full function remote control.