The Heddolf P220-2KB can replace the following remotes to control up to two devices: Allstar, Allister, Pulsar: 931, 9931, 832, 8832, 833, 8833, 9931MT GTO, Mighty Mule: RB741, RB742, RB743, RB744 Carper: CX-318-1 Not all compatible models may be listed. The new compact design Heddolf P220-2KB replaces the older model also know as the P220-2 by Keystone is a two button visor gate or garage door opener radio control transmitter that is compatible with the Allstar, Allister, Pulsar, GTO and Mighty Mule brand of radio controls with 8 Trinary (+, 0, -) type code switches that operate on 318MHz. This Heddolf P220-2KB visor remote control has excellent stability and transmission range. This item is new in box and includes the visor clip, battery and programming instructions. The Heddolf P220-2KB can replace the following remotes to control up to two devices: Allstar, Allister, Pulsar: 931, 9931, 832, 8832, 833, 8833, 9931MT GTO, Mighty Mule: RB741, RB742, RB743, RB744 Carper: CX-318-1 Not all compatible models may be listed.