Feature: 1. Good Heat Dissipation: The controller housing is made of high quality aluminum alloy with a grooved design, which protects the internal circuits from thermal overload due to good heat dissipation. 2. Dual Mode Mode: Intelligently identify the state of the motor Hall. Switch the working mode, if the Hall is normal, there will be Hall operation, and if it is damaged, it will switch to no Hall operation. 3. Scope of Application: The 72V/84V 1500W brushless motor controller is a good accessory for electric bicycles, scooters, etc., bringing you a more comfortable riding experience. 4. Long Service Life: The cables and interfaces of brushless speed motor controller are durable, ensuring a low failure rate for long term use. More efficient and energy efficient. 5. Controller Box Size: 72/84V voltage, 1500W power, 50A current limit, 63/73V low voltage. Controller box size is about 22.8x8.5x4.5cm / 9.0x3.3x1.8in. Specification: Item Type: Electric Scooter Bike Brushless Motor Controller Material: Aluminum Alloy Voltage: 72 / 84V Power: 1500W Current Limit: 50A Low Voltage: 63 / 73V Color: As Pictures Shown Weight: Approx. 939g / 33.1oz Controller Box Size: Approx. 22.8x8.5x4.5cm / 9.0x3.3x1.8in. Package List: 1 x Controller1 x Manual