Chamberlain 850CB 856CB Compatible Mini Remote Garage Door Opener

The FireFly transmitter is a very small keychain style remote operating at 390 MHz. The remote achieves its small size by using state-of-the-art, surface mount components. It has been designed for use with Chamberlain, LiftMaster and Sears receivers, with dip switches. For PROGRAMMING Find the "learn" button on your existing garage door opener (the unit with the motor located on the ceiling of your garage). Press and hold this "learn" button for 2 seconds and the release. The LED light located beside the "learn" button will go on. Then press the button on your new transmitter remote for 1 second and then release to activate it. The LED light on your existing garage door opener will flash, then go off. Your remote transmitter is now programmed into your existing garage door opener and will operate your garage door. OPERATION Once the codes are set to match the transmitter codes, you may test the system. Ensure the gate or door is visible and clear before testing. Step 1- Push the Stinger's button from a distance of about ten feet. If the receiver activates, the switches are properly set. Step 2- Test the transmitter from several locations to discover any "blind spots" caused by interference. BATTERY ACCESS Slide front cover down to reach battery compartment. Be aware of battery polarity when replacing the A23 battery. TECHNICAL SPECIFICATIONS Operating Frequency- 390 MHz Number of Buttons- 1 Battery- 1 ea. 12V A23 Number Combinations- Lots :-) Operating Temperature- -20F - 100F Overall" Weight- 1 oz. FCC ID: SU7FIR390LMPB1K3