Keep your hands warm in cold weather riding. Fits for all 12V motorcycle, E-bike and other vehicles. Easy to install and operate. Just need to wire this in to a positive wire from your ignition. With all necessary bits and pieces to install these under your current handgrips. If the bike doesn't have a battery,just need to locate the DC regulator. heater size: 13 x 10 mm (Single piece) Voltage:12V Power: 10W * 2 With ON/OFF switch Three gears adjustable Scope of application: 22-35cm handle Installation instructions: 1.Place the heat plate on the right position 2.Wrap the heat plate around to the handlebars evenly,especially at the junction with the heating plate. 3.Put on the jacket tube and adjust the position,using a hot-air blowing outer sleeve shrinkage uniformity. 4.Mount the switch in the rod of the rear view mirror. 5.Connect the power line.Line Red and Line Black are not divided into positive and negative,but must installed in control by the ignition key. Colour: black Material: plastic Package Contents: 1 x heat shrink tube 1 x heating pad group (left and right) 1 x tape 1 set x installation accessories Only the above package content, other products are not included. Note: Light 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.