ALEKO ACC4 Accessory Kit for ALEKO Gate Openers. Photocells - keep your automatic gate opener from closing accidentally on a vehicle or more importantly on a person Push Button - allows to open the gate from inside of the property (no transmitter needed). Simply push the button to start or stop your gate opener Keypad Box - saves your the keypad Keypad - provides convenience and security restricts gate access to only residents and invited guests