1. Quick & smooth 2. Water proof design 3. Built-in SBEC, multiple protections 4. Easy operation, parameters can be setup by transmitter or program card 5. Use powerful & high performance MCU. Users can set functions as their demand, fully embody Intelligent characteristics. Unique circuit design, strong anti-interference. Waterproof design (Note: if there is water in the ESC, Please dry the water at the connectors). Start mode can be set. throttle response fast, and it has a very smooth speed control linearity. Compatible with scale boat & racing boat . Low-voltage protection threshold value can be set. Built-in switch BEC, large power load with servo, lower power consumption. Multiple protection functions: input voltage abnormal protection/ low-voltage cutoff protection, over-heat protection and throttle signal loss protection, make the ESC more reliable. High power safety performance: wherever the throttle lever is, the motor will not start immediately. Over thermal protection: when ESC temperature is over 100 , output power will automatically reduce. When it's lower than 80 output power will return to normal. Cycle menu setting, simple operation. Support setting with program box and transmitter. 90A: Output: Continuous 90A, Burst 540A up to 10 seconds. Input Voltage: 2-6S BEC: 5.5V/5A Size: 57x49x18 mm. Application: max 100cm boats Colour:Black Material:Metal Package Contents: 1X Brushless ESC Speed Controller Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.