1Two Way Control: With a two way control design, this 30A brushless ESC can control the thruster forward and backward. 2High Performance: 36S applicable voltage and with a 5V/3A BEC, the ESC has high working performance. 3Application: Built in underwater propeller drive, no additional programming required, the 30A ESC is suitable for most underwater thrusters. 4Lightweight and Portable: This brushless ESC is small and lightweight, does not take up space, and can be easily taken away. 5Material: Using high quality electronic component material, the 30A ESC is durable and stable in use. Item Type: 30A Two Way Brushless ESC Material: Electronic Component Product Color: As Pictures Shown Product Weight: Approx. 22g / 0.8oz Continuous Current: 30A Peak Current: 35A Applicable Voltage: 3-6S Lipo BEC: 5V3A Application: Suitable for RC boat and RC underwater thruster 1 x ESC 1 x Manual The ESC is not waterproof. It is suitable for installing the ESC in a built in compartment or potting it by yourself for waterproofing.