Features: Water-proof and dust-proof for all-weather races. (Note: please uninstall the cooling fan before using this ESC in water; Clean and dry it soon after the use for avoiding the connectors get rusty.) Specially designed for RC car with excellent start-up, acceleration and linearity features. Compatible with sensorless brushless motor. The strong resistant current capability, excellent heat dissipation. Multiple protections features: Low-voltage cut-off protections for li-battery or nickel battery/ Over-heat protections Throte signal loss protections/ Motor blocked protections. Easily programmed and compatible with pocket-sized program card. Specifications: Material: Plastic, Metal Size: As Shown As Picture Note: 1: Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2: Due to the difference between different monitors, the picture may not reflect the actual color of the item. Package includes: 1pc RC Brushless Electronic Speed Controller