BOSS AUDIO ATV Speakers/Amp, 3 in, Black ATV/Motorcycle Sound System, MFG# MCBK425BA, includes two 3 in speakers in black housings, mounting hardware, built-in 600 Watt amplifier, AUX/RCA inputs, and Bluetooth streaming. Wired volume control. Mounts to 0.75 in-1.25 in handlebars. 12VDC input.