1. Waterproof and dustproof for all-weather racing; (Note: Please uninstall the coolina fan before you use it in the ESC in clean and dry waters; tce after use to avoid the connector getting rusty.) 2. Specially designed for automobiles; in RC with excellent starting and linearity functions. 3. Compatible with sensorless brushless motor. Strong current resistance, excellent heat dissipation 4. Multiple Protection Functions: Low voltage protection for lithium or nickel battery/Sounder protection Heat/Throttle protection/Motor blocking protection. 5. Easily programmed and compatible with pocket connection program card. Connet to Battery Connet to Motor Connet to Receiver Switch Specifications Model: 120A/150A Explosive Current Cont.Current 120A 600A/150A 720A Sensorless Brushless Moto Sensorless Brushless Moto For 4S Lipo or 12 Komoacute; NiMH processors: for 4S Lipo or 12 comocute; rek NiMH 1.on-road:40XX-size or smaller motor with KV less than 3000 1.on-road: 42xx-size or smaller motor with thekv less than 3000 Motor type with KV less than 2500 2.Off-road/Buggy/Monster: 40xx or smaller motor with KV less than 2500 2.Off-road/Bugqy/Monster:42XX-size or smaller moto For 6S Lipo or 18 komoacute; NiMH processors: for 6S Lipo or 18 comocute; rek NiMH 1.On-road:40XX-size or smaller motor with KV less than 2500 1.On-road:42XX-size or smaller motor with theKV less than 2500 2. Off-road/B