Easy assembly,It comes with three connecting wires:brown,black and blue.Blue(positive).Brown(negative).Black(connect to the equipment,positive) Total size:49 x 58 x 43mm/1.9’x2.3’x1.7′(L*W*H),connecting line length:55cm/21.6′,case material:aluminum-alloy. Package content:1x Motorcycle Headlight Double Control Switch Product name:Motorcycle Headlight O/I Double Control Switch,Feature:switch has the red lamp,when the switch turn on,the lamp will be lighting,the light goes out when turned off Mount hole diameter:22mm/7/8’Handlebar,Suitable for 12V battery installation motorcycles,electromobile,ATV,scooter.