The Nano SPY RELAY/ALARM from JRI is a 2-in-1 device. This signal amplifier allows you to double the wireless range between the Nano SPY LINK gateway and the Nano SPY data loggers. A maximum of one RELAY/ALARM can be placed between a Link and the Nano SPYs. In case of a limit or technical alarm, the RELAY/ALARM alerts locally with the LED light strip (green, blue, red) and/or the built-in buzzer. An external buzzer or beacon can be connected to the potential-free contact output. Equipped with backup battery that maintains the wireless connection for +/- 10 hours after a power failure. Supplied including mains power supply.