Electronic SmartDoor Small

This dog door gives your dog a key to the house Sensing range adjustable up to 3 feet System can identify up to 5 SmartKeys for use with up to 5 pets 3 easy-to-set entry modes: locked, unlocked and automatic access Energy efficient, weather-resistant seal and insulated flap This electronic dog door is operated by the lightweight key worn as a tag on your pet's collar. The SmartKey communicates with the SmartDoor through a radio frequency and unlocks the door as the pet approaches and relocks automatically as the pet enters or exits. Range is adjustable up to 3 feet. Offers your dog three levels of security - Automatic (unlimited entry through use of SmartKey), Always Unlocked, and Always Locked. Requires 4 D-cell batteries (not included). Dog door is energy efficient, with weather resistant seal and insulated flap. Fits standard doors from 1-1/2" to 2" thick. Lifetime limited warranty. Includes 1 SmartKey. White. Add up to 4 additional SmartKeys (sold separately). SizeMax Weight Flap Opening Overall Dimensions Fits Door ThicknessSmall15 lbs6-5/8" x 8"9-1/2" x 15-3/4"1-1/2" to 2"Large100 lbs13-1/16" x 15-3/4"17-3/8" x 25"1-1/2" to 2" Please click on "More Information" for training instructions.