Features: Water-proof and dust-proof for all-weather races;(Note:please uninstall the coolina fan before usina this ESC in watersClean and dry it soon after the use for avoiding the connectors get rusty.). Specially designed for Remote Control car with excellent start-upacceleration and linearity features. Replacement for sensorless brushless motor. The strong resistant current capability,excellent heat dissipation. Multiple conservation features:Low voltage cut-off conservation for lithium or nickel battery/Over-heat conservation/Throttle signalloss conservation/Motor blocked conservation. Easily programmed and compatible with pocket-sized program card CONNECTIONS,Connet to Battery Connet to motor,Connet to Receiver Switch. Specification: Model 120A / 150A Burst Current Cont.Current 120A/600A 150A/720A Sensorless Brushless Moto Sensorless Brushless Motor Suitable Car 1/8 car Resistance 0.00035ohm BEC Output 5.8V/5A For 4S Lipo or 12 cells NiMH This is Electronic Speed Controller(ESC)for car. Hiah power system for Remote Control model is verv dangerous. so please read this manual carefully. Since we cant control over the correct use,installation,application,or maintenance of our products, we've no liability shall be assumed nor accepted for any damages,losses or costs resulting from the use of the product.Any claims arising from the operating,failure of malfunctioningetc.will be denied.We assume no liability for personal injury, consequential damages resulting from our product or our workmanship. Size60*50*38MM Weight108G Package Information: Package Size: 8*6.5*4.5cm Package Weight: 110g Plastic Package Package List: 1* 120A Brushless ESC