The 450W kit includes: 1). 1x 450W brush DC motor 2). 1x Chain 3). 1x Freewheel 4). 1x Freewheel adapter 5). 1x Motor controller with fuse wire 6). 1x Mounting plate + bolts 7). 1x Throttle handle 8). Some connectors Note: this kit without battery and battery charger . 450W brush motor Before order (important): 1). This kit is for the bike that using a single-speed freewheel.If your bike has some speed gears or the gear is fixed, 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 (the 26-inch bike with a 250W or 350W motor can run about 25km/h, and the 450W 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. Motor controller with Throttle Installation process Sprocket assembly 16T flywheel adapter chain
