Associated model numbers: M3-2312, M3-2314, M3-3313


A family of state-of-the –art transmitters, each transmitter is custom encoded and ergonomically designed to be an integral part of your garage door opener system, with two styles to suit your personal preference.

  • Mini (2- or 4-channel)
  • Micro (3-channel), the smallest transmitter of its kind.

1.Using the Transmitter

All Transmitters come with batteries already installed.

  • To open or close garage door, press and hold the button (mini and micro transmitters have indicator lights). When garage door begins to move release button.
  • To stop the garage door during travel, press and hold button until doorstops, then release button.
  • To continue the garage door travel after stopping it, press and hold the button. Press button once, the door will travel in the opposite direction.

2. Transmitter Mounting

The transmitters can be conveniently mounted on the wall using mounting plate (optional) or inside your car using the visor clip. These two mounting alternatives are available with Mini models only. The Micro can be sued with the key ring attachment.

Mounting Plate:

The mounting plate enables you to mount the transmitter easily to the wall or other area.

  • Secure the mounting plate to area using screw and anchor.
  • Slide the transmitter into the mounting plate, which will hold it firmly in place.

Visor Clip

The visor clip allows for easy mounting of the transmitter to a car visor.

  • Snap visor clip into transmitter.

Note: If you do not need the visor clip, install the visor compartment cover.

Key Ring Attachment

The key ring attachment permits easy mounting of the Micro to a key ring.

  • Open the Micro by using a small coin.
  • Snap the key ring attachment.
  • Close the transmitter.

3. Battery Replacement

The installation of the battery for Mini and Micro is the same.

When replacing batteries follow the steps below.

  • Open the transmitter by using small coin.
  • Insert a 3V battery (type CR2032)
  • Close the transmitter.

Note: Replace batteries with same type only.

4. Multiple Transmitters

Each transmitter comes factory programmed with random codes. 2-channel transmitters have different random codes, one per button, 3-channel transmitters have 3 different random codes and 4-channel transmitters have 4 different random codes, one per button. Transmitters that are purchased separately as accessories have random codes that must be changed in order to match the code of the “active” transmitter. Below are instructions for transferring an active code from a button on one transmitter to a button of your choice on another transmitter.

  • Connect the transmitter with active code to the new transmitter using the programming connector.
  • Press and hold the selected channel button on the transmitter with the active code. The light in the transmitter illuminates.
  • Press and hold the respective channel button on the new transmitter. The light in the transmitter initially starts blinking and then illuminates continuously after 1-2 sec. Code transfer is completed.
  • Programming connector can be removed and both transmitters can now be used to operate the same door.

Note: For Multi-button transmitters, be sure to carry out this procedure for all the buttons you desire to use.

5. Changing the Code Transmitters

The transmitter factory preset code can be changed as follows.

  • Connect the programming connector into the lateral socket of the transmitter to change the code.
  • Short one of the outer pins of the programming connector with the middle pin.
  • Press and hold the respective channel button. The light will blink rapidly for approx. 5 sec. Release the button after the light illuminates continuously. Then remove the programming connector.

Note: For multi-button transmitters, be sure to carry out this procedure for all the buttons you desire to use.


Contact Us

We invite your inquiries regarding your garage door opener.

  • For technical and compatibility issues, we must know the brand and model of your opener to help
  • Be sure to include your complete and accurate email address with your inquiry
Name A value is required.
Email Address (accurate) A value is required.Invalid format.
Phone No.
Brand of Opener
Model Number of Opener
(located on motor head behind light bulb cover)
Model Number of Remote Control
(located on back of remote)
Model/Part Number of Current Receiver
(located on Receiver)
Enter Security Code

Comments: - Owned by 1st Garage Door Openers, Inc., an independent family owned and operated business serving the Garage Door and Garage Door Opener Industry since 1981. Providing excellent customer service and assistance for over 25 years. We are a discount reseller of garage door opener remotes, repair parts, keyless entry and gate operator controls for your home, business, or gated community. We carry parts for the following garage door openers: Lift-Master, Chamberlain, Sears Craftsman, Access Master, Sears Best Craftsman, Sears Automatic Door Opener, Master Mechanic, Security +, Formula 1, Garage Master, Billion Code, LiftMaster Professional, Estate Series, Premium Series, Contractor Series, Power Driver, Whisper Drive, Genie, Alliance, Norelco, Blue-Max, Lift-A-Door, Pro Max, Hercules, Stealth, Excelerator, Intellicode, Genie Pro, OverDrive, Python 2, Signature, Phantom, Legacy, Medallion, CodeDodger, Overhead Door, Genie Shop Vac, Stanley, Vemco, Quiet Glide, SecureCode, Lightmaker, Innovative Products, Whistler, U-Install, Popular Mechanics, Allister, Allstar, Pulsar, MVP, Challenger, GTO, All-O-Matic, Electrolift, Westinghouse, AM/11, Linear, Access Pro, Moore-O-Matic, MegaCode, Delta 3, MultiCode, Heddolf, ESP Micom, Intercontinental Dynamics, Crusader, Wayne Dalton, iDrive, Door Master, Quantum, Classic Drive, Tec Key, Martec, Monarch, Telectron and other garage door openers, and gate operators. Brand names of Garage Door openers are registered trade names of the respective entities and are only used for reference.