Firefly 390LMD21K Keychain Remote 61LM LiftMaster
Brand: Transmitter Solutions
Color: Blue
Categories: Tools & Home Improvement, Building Supplies, Building Materials, Doors, Garage Doors, Openers & Parts, Keypads & Remotes

Compatibility: Liftmaster 61LM CONTENTS This remote is a very small (1/2" x 1-7/8" x 1-1/2") key-chain style remote operating at 390 MHz. It achieves its small size by using state-of-the-art components. It has been designed for use with; LiftMaster dip-switch receivers. CODING Access to the remote's toggle code switch is achieved by unscrewing the back cover. Set the NINE-digit toggle code switch to match the code set in the receiver. Move switches using a small pointed object, such as a paper clip. Gently switch the small switches to either +, -, or Neutral positions. When complete screw the back cover back into position 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 remote'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 Unscrew the back cover 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 Dimensions- 1/2" x 1-7/8" x 1-1/2" Weight- 1 oz. COMPATIBLE REMOTE'S LiftMaster 61LM, 62LM & 63LM Chamberlain 750CB, 753CB & 756CB Sears Craftsman 139.5100, 139.5300, 139.53100, 139.53106, 139.53110, 139.53200, 139.532006, 139.53210, 139.53300, 139.533006, 139.53310, 139.53315, 139.53400, 139.53403, 139.53413, 139.53500, 139.535006, 139.53510, 139.53513, 139.53515, 139.53600, 139.536006, 139.53601, 139.53602, 139.53603, 139.536036, 139.53604, 139.53605, 139.53606, 139.53607, 139.53608, 139.53609, 139.53610, 139.53611, 139.53612, 139.53613, 139.53622, 139.53632, 139.53707, 139.53708, 139.53718, 139.53758, 139.53778, 139.5225SRT, 139.53225SRT, 139.53315S

Blue w green button, or Black w blue button (new model)
One-button
Key chain model
9 dip switches
390 MHz

Manufacturer: Transmitter Solutions
Part Number: 390LMD21K
Item Weight: 0.8 ounces
Product Dimensions: 2 x 2 x 0.5 inches
Item model number: firefly 390LMD21K
Is Discontinued By Manufacturer: No
Size: 2 inches by 2 inches and very thin
Color: Blue
Material: Plastic
Shape: Rectangular keychain
Item Package Quantity: 1
Batteries Included?: Yes
Batteries Required?: No
Battery Cell Type: Alkaline
Average Battery Life: 5 years
Date First Available: September 14, 2009