Water-proof and dust-proof for all-weather races; (Note: please uninstall the cooling fan before using this ESC in water; Clean and dry it soon after the use for avoiding the connectors get rusty.) External programming port, easy to connect to the Program Card when setting the ESC; Proportional brake with 4 steps of maximum brake force adjustment and 8 steps of drag brake force adjustment; 9 steps of acceleration(punch) adjustment from "soft" to "Very aggressive" to fit for different kinds of models, tires and tracks; Multiple protections: Low voltage cut-off protection / Over-heat protection / Throttle signal loss protection / Motor lock-up protection; One-button(the "SET" button on the ESC) to set the ESC, and easy to reset all parameters to the factory default settings; Compatible with the optional device-the portable Digital LED Program Card, especially convenient for outdoor use. Instuctions: 1. Connect BEC wires with the receiver 2. Connect motor wires with ESC 3. Turn on the transmitter 4. Connect battery pack with ESC then switch on the ESC. 5. When the connection of motor and battery is finished, the motor emits"Beep-Beep"tone. 6. When the throttle stick is in the neutral position, the motor re-emits "Beep-Beep"tone. 7. The ESC is workable. colour:black Material:plastic size: 8 x 5 x 1cm Package Contents: 1 x RC Program Card Only the above package content, other products are not included. Note: Light 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.