GATEXPERT Automatic Rack Sliding Gate Opener Kit- Gear Track Driveway Security D? -- The gate weight should be less than 1300lb and length should be less than 40ft. -- Remote control is single button mode, one same button on the remote control to circularly control the main engine OPEN/STOP/CLOSE/STOP, the three buttons have the same function, the other button is pedestrian mode. Supports up to 25 Remotes (Including batteries). -- In the closing process, when infrared ray of the infrared sensor is covered, the gate will open immediately, to protect user and property security. -- Auto-Close time can be set to 12, 24, or 36 seconds and no automatic close function. -- Soft start and slow stop function, which can extend the life of the gate opener and safer.