1、Excellent Metal Shell: This lithium battery conversion kit is made of excellent metal material for the shell, which has a good heat dissipation function and can protect the internal circuitry so as to avoid thermal overload. 2、Excellent ABS Material: This lithium battery conversion kit is made of excellent quality ABS material for gauges, which is lightweight, sturdy and durable, with fine workmanship, good toughness and waterproof performance, providing better protection for the internal circuitry and making it more durable. 3、Multifunctional LCD8H Display: This lithium battery conversion kit features a multifunctional LCD8H panel that will display many useful data on your bike, such as on and off buttons, light switches, battery level display and other functions, one display can keep you in control at all times. 4、Wide Application: This lithium battery conversion kit has a very wide range of applications and can be used for DIY, electric car, electric scooter, folding car and so on. 5、25A Square Wave Controller: This lithium battery conversion kit uses 25A square wave controller, which is easy to operate and very practical. Item Type: Bike Lithium Battery Conversion Kit Material: ABS, Rubber, Aluminum Alloy, Metal Applicable: Suitable for 500W750W motor. Matching communication protocol for the use of for Quantum products (commonly known as the first communication protocol). Controller Size: Approx. 125 x 65 x 40mm/4.92 x 2.56 x 1.57in Maximum Current: 25 ± 1A Controller Rated Current: 12A Controller Speed Setting: 1-4.2V 1 x Controller 1 x Power Assist Sensor 1 x Thumb Throttle 1 x Display 1 x Bracket 4 x Gasket 2 x Screw 2 x Manual