2.1 Bluetooth Speaker. Features: 3" full range driver for satellites speaker. 4" heavy duty subwoofer speaker. Heavy duty metal grill for satellite. Innovative automatic multi-color LED. Bluetooth 4.0 version supporting audio streaming. Plug & play USB reader. USB reader supporting MP3/WMA dual formats decoding. Apply advanced PLL Technology for uninterrupted digital FM experience. FM storage up to 100 stations. Side panel controls for volume and bass. Fluorescence full function remote control. Wooden cabinet delivers strong and low distortion bass. Specification: Power output: 12Wx2+13W (RMS). Satellite driver: 3" full range. Subwoofer driver: 4". Subwoofer Frequency response: 45Hz~ 105Hz. Satellite Frequency response: 160Hz~20kHz. Signal to noise ratio: ≥ 65dB. Separation: ≥ 35dB. Dimensions: Subwoofer(WxHxD): 201 x 243 x 240 mm. Satellite(WxHxD): 112 x 153 x 96 mm. Weight: 2.85 kg