The 973TS LiftMaster® Three Button Remote has been replaced by the 973LM Remote. The LiftMaster 973LM allows you to control up to three garage doors or gates directly from your vehicle. It is designed as a visor-mounted remote control compatible with devices featuring an orange or red learn button. Included in the package are a visor clip, battery, and user manual. This model supersedes the now discontinued 973TCS.
If you place your order today, you can expect delivery by the next business day. 
Additionally, there is a 30-day return policy if the product does not meet your expectations.
Locate the ORANGE Learn button on your garage door opener power head (it will be a square ORANGE button on the end of the motor unit where the antenna wire is located.) You may have to remove the light lens cover on some models.
Press and release the ORANGE learn button on the motor unit of your garage door opener. A yellow light will light up next to the learn button.
Immediately press and release the push button on the new remote control (you should hear a click in the motor unit and your light bulb(s) may flash).
Press the remote button again you just programmed to test it. You are now done.
Repeat each step for each orange learn button opener using only one button for each unit.