All HN-50 Series products are based on the WIT2450 and can be used as either base stations or remote stations for WIT2450-based devices. All features and modes of the WIT2450 are supported in the HN-50 series products.

All HN-10 Series products except the HN-110 are based on the WIT2410 and can be used as either base stations or remote stations for WIT2410-based devices. All features and modes of the WIT2410 are supported in the HN products. The HN-210D/X products also support Modbus operation.

RFM's HN I/O (HNIO-series) modems feature bidirectional transmission and the company's patented FHSS technology. The product line includes the HNIO-091R and HNIO-241R relay modems, which operate at 900 MHz and 2.4 GHz respectively, and two analog/digital modems, the 900 MHz HNIO-091A and 2.4 GHz HNIO-241A. The relay modems provide four 250VAC 5A relays, and the analog/digital modems provide two 4-20mA receivers and transmitters along with two digital I/O channels.

Unlike wireless data transceivers, which transmit serial data streams, wireless I/O modems transmit voltage or digital signals. Analog/digital models are typically used to relay key levels of sensor data, while relay units control the state of such equipment as light fixtures, alarms, and locks. Line of sight range extends beyond 20 miles for the 900 MHz I/O modems and up to seven miles for the 2.4 GHz units, depending upon the antenna used. The modems can operate over an input voltage range of +9Vdc to +30Vdc, making them suitable for battery and solar power sources. Class I Div 2 certification allows the modems to be deployed in hazardous locations. All are DIN-rail mountable.