The HID868 flush-mounted transmitter is a battery-powered radio transmitter designed for flush-mounting in flush-mounted boxes. By connecting a momentary switch (e.g. roller shutter, bell) to it, it can be integrated into all alarm systems, gate automation and smart home installations equipped with an RDA radio receiver, 868 MHz/Keeloq. The first channel button on the housing allows you to check the operating range before mounting the device.