31216 LCD screen， with clock Support FM full range frequency radio Earphone output， audio input ( with earphone plug adapter cable) Adopt high fidelity stereo circuit design Fashion， waterproof， shockproof Digital circuit design， energy-efficient， low standby power consumption Power failure automatic memory， no need to reset after starting up next time Electronic turn on/off， volume control Color: black Dimension: about 80 x 50 x 45 mm Controller cable length: about 400mm Speaker diameter: about 63mm Audio cable length: about 100mm Working voltage: 12V Rated power: 2 x 4w Suitable for all kinds of motorcycles and electrombiles. 1 x Controller 2 x Speakers 1 x Audio cable 1 x User Manual In original package