The SES303 sensor is powered from 2XAA batteries and it is Z-Wave Plus certified. In addition to the standard functionality they also support one of the following optional configurations One external NTC wired temperature sensor (SES 001) Four external wired pipe/tank temperature sensors (SES 002) each connected by a 1 meter long cable. One external wired pipe/tank temperature sensor (SES 003), connected by a cable of 4 meters long. This unit is ideal for temperature and humidity measurement for smart central heating controls or any other similar application. Its user interface is straightforward and with a push button and LED indication on back side, one can easily include/exclude this to a Z-Wave network.