Allister OCS remote open close stop for 1 door only Features and Specifications Operates one door only using the open close stop feature Allstar garage door opener remote control transmitter model 8833 OCS (same as Allister or Pulsar) Replaces Pulsar or Allister brand gate or garage door opener 318 Mhz frequency, 3-buttons remote transmitter, will operate up to 3 devices Three positions dip switches (trinary) Compatible with model 9931-318, 8832-318 (ADX or PDX) Open/Close/Stop Function.