Craftsman &frac12; HP Chain Drive Garage Door Opener with two Multi-Function Remotes and Keypad 00954985000P Wireless keyless entry pad allows entry into garage without a key or remote using a secure 4-digit programmable PIN Quick Install Rail System provides fast & easy installation Simple user interface monitors, sets and adjusts the force required to open and close the garage door during temperature fluctuations Energy Efficient sleep mode uses less than 1 watt of power Safety reversing sensors automatically reverses the door if anything interrupts the beam while the door is going down