Compatible with ALEKO gate opener models: AS/GG 450,650,900,1300, AC/AR 1300,1800,2200,2700,5700 Photocells keep your automatic gate opener from closing accidentally on a vehicle or a person Wireless keypad provides convenience and security The LM107/108 mounting post is recommended for mounting the keypad Solar controller LM118 keeps the battery charged (used only for solar applications)