Upgrade for Garage Door Opener --- No longer needs transfer pins: Just place for the new garage door remote on the side of your for M3-2312 opener; Follow the instructions in the User Manual to copy the program to the new remote Advanced Digital Security --- Extremely secure multi-bit code only compatible with for garage door openers using 315 MHz frequency. Emits strong, secure signals to Prevent Unauthorized Access As a Spare Remote for Garage Door Opener --- Each remote control allows you to control up to 2 different remote garage door openers; M3-2312 remote control has an ultra long working range of 148 feet, CR2032 Battery included Perfect Replacement --- The M3-2312 (digital 382) remote is compatible with for Keyless Entry Keypad, for M3-2312, M4500e, M4700e, DC3700, DC2500 garage door opener models; Note : Please confirm that for the garage door remote frequency is 315MHz before purchasing, otherwise the new remote not work SLEEK, COMPACT DESIGN WITH LIGHT WEIGHT Material: ABS colour: Black Package Contents: 2 x for garage door remote Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.