The TX490-JZ-5 is an RF module manufactured by ZIISOR. It is a short-range, low-power, surface-mount transceiver designed to operate on the 868 – 870 MHz frequency band with 10 mW nominal output power. The module has a high-efficiency RF amplifier for maximum range, while 50 mm x 8 mm antennas provide directional coverage. It is compliant with the Restriction of Hazardous Substances Directive (RoHS) which means it does not contain hazardous environmental substances like lead, mercury, and cadmium.