Check the listing for details. Genie GT912 390MHz 1 btn transmitter remote control 9 and 12 dip switch comp. Color: Black, Condition: New. Listed at 17.50 USD. Genie GT912 390MHz 1 btn transmitter remote control 9 and 12 dip switch compatible battery and clip are included G220 - Overhead, Genie, GT912, 912, GT90, GT90-1, GT90-3 and MAT90 Frequency: 390MHz FCC Number: XAB-HEDDI-C220 DIP Switch: 2P 12T Size: 3 1/2" x 2 1/4" x 3/4" Color Code: Blue Battery: 9V / 6F22 included Compatibility: Overhead, Genie, GT912, 912, GT90, GT90-1, GT90-3 and MAT90, Keystone Heddolf G220-1KA. This product has dual function. It is compatible with both 9 dip switch and 12 dip switch receivers. There are 12 dip switches on your transmitter each of which can be placed in two different positions (ON\OFF). These should be placed in the exact same position as the switches on your receiver. For some receivers which have only 9 dip switches it will be necessary for you to move the small black code terminal to connect with pins 2 & 3. For the 9 dip switch model receivers the code selection of the dip switches on your transmitter 1 thru 9 should be set exactly the same as those on your receiver. Switches 10, 11 & 12 on the transmitter should be set in the off position. Do not set all switches to the same position, such as 100% ON or 100% OFF.