The RF400 was a 100 mW spread spectrum radio/modem for point-to-point and point-to-multipoint data logger communications. It could serve as a field radio/modem connected to a data logger or as a base station radio/modem connected to a computer. The RF400 had a 910 to 918 MHz operating frequency range, which was used in the US/Canada. Note: In the image, the RF400 is shown with the 14204 indoor antenna.