Description: High quality brushless BEC replacement parts. Perfect controller for rc car/ truck/ boat spare parts. Low battery protection, overheat protection, startup throttle protection, signal loss protection, and abnormal voltage protection. Throttle Calibration: Throttle range can be configured to provide best throttle linearity, fully compatible with all market available transmitters. Waterproof design, special for ship model, with water cooling system to ensure that the device gets good dissipation, so that the ESC has a stronger current resistance. Specification: Material: Composite Material Model: 125A Continuous output current: 125A Instantaneous current: 480A BEC type: switching regulator BEC output: 5V 5A Number of lithium batteries: 2-6s 7. 4-22.2V Weight: 105g Model: 200A Continuous output current: 200A Instantaneous current: 720A BEC type: switching regulator BEC output: 5V 5A Number of lithium batteries: 2-6s 7. 4-22. 2V Weight: 133g Size Chart: Size: approx. 85x50x22mm/3.35x1.97x0.87inch. Package Includes: 1 Piece Brushless Water-cooled ESC Note: Please allow 1-3cm (0.4-1.18") difference due to manual measurement. Thank you for your understanding.