GMAX brand four-channel wireless remote control relay switch with remote, model GM-K19B-4. This device operates on a 12V DC power supply and utilizes a standard 433.92 MHz radio frequency. It features four independent channels (relays), allowing you to remotely manage and trigger up to four different electronic devices—such as electric locks, barrier gates, automatic garage doors, or lighting systems—using a single remote control. It is a highly practical and ideal solution for access control setups and home automation.
