Description: Indicator light、 RCA plug、 adjustable gain level、 3 screw terminals. Aluminum-made feature provides excellent heat dissipation. it is supplied single direct-current main、 with automatic polarity protection to circuitry overheating and overloading、 with good channel seperation. It has the character of low noise、 light weight、 large car power output and good sound quality. A wonderful tool for you to use this Amplifier on your 、 motorcycle、 golf cart and other places、 where you need small Amplifier in order to have a better listening experience. Dimensions: 6.30 in x 6.10 in x 2.17 in (16.0 cm x 15.5 cm x 5.5 cm) Weight: 21.46 oz (608 g)