Water-proof and dust-proof for all-weather operation; (Note: please uninstall the cooling fan before using this ESC in water; clean and dry it soon after use to avoid rust on connectors.) External programming port for easy connection to the Program Card when setting the ESC; proportional brake with 4 levels of maximum brake force adjustment and 8 levels of drag brake force adjustment; 9-step acceleration (punch) adjustment from "soft" to "very aggressive" to suit various models, tires, and track conditions; Multiple protections: low voltage cut-off, over-heat protection, throttle signal loss protection, motor lock-up protection; One-button setup (using the "SET" button on the ESC) for quick configuration; easy reset to factory default settings; compatible with portable Digital LED Program Card for convenient outdoor use. Instructions: 1. Connect BEC wires to the receiver 2. Connect motor wires to the ESC 3. Turn on the transmitter 4. Connect battery pack to the ESC, then switch on the ESC 5. When motor and battery connections are complete, the motor emits a "Beep-Beep" tone 6. When the throttle stick is in neutral position, the motor emits "Beep-Beep" tone again 7. The ESC is now operational Color: black Material: ABS Size: 8.1 x 5.5 x 1.2 cm Package Contents: 1 x RC Program Card Only the above package content included; other items not included Note: Lighting and display differences may cause slight color variation between the image and actual item. Measurement error allowed is +/- 1-3 cm.