RD20GOKELL Black Wireless Keypad for Roller Garage Door & Roller Shutter Remote to work with Teleco Control Units This is a device for opening the garage door from outside the garage with the security of a numbered key access that is needed to operate it means you can have access to the garage without having to carry around any keys or handsets and can be coded into the receiver box so there is no need for wiring. *Please be aware this unit will only work with the Ellard Teleco and Simple wireless safety edge system. Please NOTE: check the control box you have as this listing is for a control system and will not work with other brands, we also offer a range of versions to work with other control boxes.