The kit includes: 1). 1x 450W brush motor (with freewheel sprocket) 2). 1x Chain 3). 1x Customized sprocket & components 4). 1x Motor controller (with fuse wire) 5). 1x Mounting plate + bolts 6). 1x Throttle handle 7). 1x Brake lever (aluminium alloy) Note: this kit without battery and battery charger. This item is for the bike that use 44mm brake rotor, and you need to change the brake rotor to our customized sprocket,please confirm this before order, thanks a lot. 450W Bursh Gear Motor Before order (important): 1). This kit is for the bike that using the disc brake and the disc mount diagonal distance 44mm. If your bike uses V brake or coaster brake, this kit does not compatible with that bike, please choose other kits. 2). The motor bracket maybe does not fit your bike frame, this you need to modify the bracket by yourself, please confirm this. 3). This kit just for people riding bike easier, it is not fast (26-inch bike can run about 35km/h), you'd better pedal with the motor power, this can ride longer, please understand. 4). The difference between 24V and 36V is the working current, if you want to ride longer, I recommend 36V kit. 5). This kit does not include battery, you need to buy the battery separately, the lead acid battery and the lithium battery are all ok, and the battery capacity I recommend 24V 15Ah or 36V 12Ah. 6). This controller comes with 1 fuse wire and 3 fuses, if you burn 1 fuse, you'd better note what makes it burnt and avoid this happen again. Installation process