Enhanced Hi-Fi grade full-range speaker core, outstanding sound performance. Built-in Bluetooth, the music from your phone to the device anytime and anywhere. Support AUX MP3 music playing.Support USB Stick music playing. Built-in 300W D-class amplifier, continuous boost support. 7/8-1.25 inches (22-26mm) speaker installation clamp, suitable for most motorcycles, , street bikes and etc. Color: silver Material: metal +ABS BUILT-IN AMPLIFIER Input Voltage: DC 10-16 V Input Sensitivity: 100MV-3000MV Rated Power: 2 x 20W @ 4 Power: 300W Channel: 2.0 Response Frequency: 20Hz-20KHz S: 80dB Support USB Files Playing Support AUX Input SPEAKER SPECIFICATIONS- Core: 3 inch Full Range Rated Power: 20W Resonance Frequency: 80Hz Impedance: 4 Sensitivity: 84dB Frequency Response: 80Hz-16KHz Package Contents: 2 x Speaker 2 x Steering 1 x Full Function Wired Control 1 x SAE to Ring Terminal Power Cord 1 x 3.5mm AUX Cable Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.