Features: Waterproof and dustproof for all-weather use; (Note: please remove the fan before using this ESC in wet conditions. Clean and dry it promptly after use to prevent connector corrosion.) Specially designed for remote control cars with excellent startup acceleration and linearity. Compatible with sensorless brushless motors. High continuous current capacity and efficient heat dissipation. Multiple protection features: low voltage cutoff for lithium or nickel batteries, over-temperature protection, throttle signal loss protection, and motor blockage protection. Easy programming and compatible with pocket-sized programming card. Connections: battery, motor, and receiver switch. Specifications: Model: 120A / 150A Continuous Current: 120A / 150A Burst Current: 600A / 720A Motor Type: Sensorless Brushless Motor Suitable for: 1/8 scale car Resistance: 0.00035 ohm BEC Output: 5.8V/5A Compatible with: 4S LiPo or 12-cell NiMH battery This is an electronic speed controller (ESC) for RC cars. High-power systems for RC models can be dangerous; please read the manual carefully. As we cannot control the correct use, installation, application, or maintenance of our products, no liability shall be assumed or accepted for any damage, loss, or cost resulting from product use. Claims arising from operation, failure, or malfunction will be denied. We assume no liability for personal injury or consequential damages. Dimensions: 60 x 50 x 38 mm Weight: 108 g Package Information: Package Dimensions: 8 x 6.5 x 4.5 cm Package Weight: 110 g Packaging: Plastic sealed package Package Contents: 1 x 120A Brushless ESC