Electric Bike Controller Kit 24V 500W Brushed Controller 3 Speed Throttle Grip Brake Lever with Lock for Tricycle gray.Feature: 1. FAST HEAT DISSIPATION: The bike controller shell is made of aluminum alloy, which has fast heat dissipation, avoids thermal overload and guards the internal circuit. 2. RUBBER GRIP: Electric bike throttle grip is made of comfortable and soft rubber material, making the grip more comfortable and not tired for a long time riding. 3. WIDELY APPLICABLE: Electric bike mot