The Digital Keypad is programmable for up to fifteen different entry codes. The digital gate keypad can be used as a wired or wireless installation for all Automatic Gate Openers. In a wired installation, the Digital Keypad can operate a garage door. In a wireless installation, the Mighty Mule Digital Keypad can be used with any garage door opener that receives a 318 Mhz FM, signal. The digital keypad by Mighty Mule requires 3 AA batteries. If the keypad is to be wired to the lock or gate opener, you will need to purchase 16 gauge, multi-stranded, low voltage wire. Mighty Mule is a registered trademark of GTO Inc.