1、Application: The speed control throttle grip is suitable for electric bikes and scooters, fits most electric bikes with hall sensor controller. 2、Universal Type: Regardless of VRLA, lithium batteries, water batteries, dry batteries, regardless of various types of electric vehicles, 12V‑99V electric vehicles can be used. 3、Plastic Material: Using high quality plastic material, the twist throttle grip accelerator is anti impact and durable. 4、2.3cm Diameter: The twist throttle grip handlebar is 2.3cm and it is easy to install on the 2.3cm / 0.9in diameter handlebar. 5、3 Thumb Throttle Wires: The green wire is the thumb throttle hall signal wire, the red wire is the thumb throttle positive 5V, and the black wire is the negative (the same below). Please be sure to check the wiring of the controller's function wires. You cannot simply check the color of the controller. Once it is connected incorrectly, it will cause damage to the controller or the throttle. 6、5 Core Wires: The blue wire is connected to the outlet wire of the controller switch lock, and the yellow wire is connected to the positive pole of the power supply of the controller switch inlet wire (power switch, which controls the power supply of the whole vehicle). Item Type: Twist Throttle Grips Material: Plastic Product Color: As Pictures Shown Twist Throttle Grip Diameter: Approx. 2.3cm / 0.9in Product Weight: Approx. 334g / 11.8oz Efficiency: ≥98% Hall Level: Linear Hall 1 x Handlebar Grip 1 x Twist Throttle Grips 2 x Keys