Note: If the LED display on your old handheld transmitter lights up green or yellow, it is not compatible. You need access to the receiver. Therefore, please ensure that you have access to the receiver/gate opener before purchasing. The handheld transmitter impresses with its compact, handy design and its simple setup and operation. With four channels, up to four different Sommer operators can be programmed and controlled. It is a robust, high-quality replacement including a sliding button protective cover. This handheld transmitter fits your Sommer receiver just like the old one. : for SOMMER 4020 TX03-868-4. for SOMMER 4026 TX03-868-2. for OPEN 4021 for OPEN 4025 for SOMMER 4011 for SOMMER 4025 for SOMMER 4031 for SOMMER 4035 for SOMMER 4025 BLUE for SOMMER 4026 TX03-868-2 for SOMMER 4020 TX03-868-4 4011V000 4020V000 4025V000 4026V000 4031V000 4035V002 IMPORTANT!!! Not compatible with Sommer 868 MHz SOMloq2 (Pearl, Pearl Twin, Pearl handheld transmitter) Not compatible with SOMMER