Features： 1、Aluminum Alloy Shell Controller: The controller adopts aluminum alloy shell, with good heat dissipation performance and wire, which is durable, and can match with all meters of No. 2 communication protocol, applicable to 36V, 48V 250W motor. 2、S900 Meter: The shell of the S900 meter is made of ABS material, which has clear display interface. The button operation is very quick and is convenient to use. 3、Data Display of Meter: The meter can display speed, power assisted gear, power, fault prompt, total mileage, single mileage and single riding time, which is convenient to read data when riding and help you master the riding dynamics at any time. 4、Easy to Install: The electric bike modification controller kit is easy to install and use, and the equipped LCD meter and thumb throttle suitable for 22.2mm handlebars. 5、Fully Equipped: This electric bicycle controller kit includes 15A controller, S900 meter, quick release thumb throttle, booster, controller storage bag, etc, which can be used alone or in combination. You can DIY according to your own need. Specification： Item Type: Electric bicycle controller kit Material: Aluminum alloy, ABS Weight: Approx. 820g/28.9oz Controller Parameters: Current: 15A Voltage: DC 36V, 48V Speed Setting: 1-4.2V dual mode Brake Input: Low level Meter Parameters: Applicable Handlebar Installation: 22.2mm/0.9in diameter handlebar Voltage: 24V, 36V, 48V Interface: 5pin Meter Function Description: 1. Display Functions: Speed display, power assisted gear display, power indicator, fault prompt, total mileage, single mileage, headlight display, single riding time display. 2. Communication Protocol: No.2 communication protocol Package List： 1 x Controller 1 x Meter 1 x Thumb Throttle 1 x Boost Sensor Connecting Wire 1 x Boost Sensor Booster Pad 1 x Boost Sensor Ring 2 x Fixing Strap 1 x Controller Storage Package 2 x Meter Mounting Screw 2 x Meter Mounting Nut 2 x Meter Mounting Gasket 1 x Meter Instructions