The Pulsar 8866CT-OCS garage door and gate remote replacement is designed to replace Pulsar, Allister and Allstar transmitters operating on 318 MHz. This Model 8833CT-OCS Pulsar remote is for use with the P831 commercial receiver. It's compatible with models 833, 833T, 8833, 8833T, ADX8833 and PDX8833. Operate as many as six doors using the open/close/stop function.