General description The 868MHz Garage Door Remote Control is a reliable replacement for your garage door opener, designed specifically for compatibility with models such as 4020 TX03-868-4, 4026 TX03-868-2, 4020V000, and 4026V000. This remote control features a modern and compact stainless steel design, ensuring both functionality and style. Technical specifications Frequency: 868 MHz Channels: 4 Coding method: Rolling code Battery type: Lithium manganese dioxide (CR2) Battery capacity: 3 volts Dimensions: 87 x 24 x 16 mm (closed) Weight: 40 grams Range: Approximately 50 m (depending on environment) Compatibility and accessories Compatible with the following models: 4020 TX03-868-4 4026 TX03-868-2 4020V000 4026V000 4021 4025/4025V000 4031/4031V000 4035/4035V002 Includes: Remote control unit. Installation To install the remote control, follow these steps: Locate the radio receiver on the circuit board (red button or labeled CODE/RADIO). Press the learning button (A) on the radio