This Expansion Module is for your RF Explorer. It can be plugged in your RF Explorer unit to extend the coverage to 240-960Mhz frequency band. It is attached internally to the RF Explorer main board and exhibits a second antenna connector to cover the new band. It is easy to plug in your RF Explorer unit and is compatible with all RF Explorer models. This model extends band coverage to all popular sub-1Ghz ISM bands, including 315Mhz, 433Mhz, 868Mhz and 915Mhz, also including UHF TV, 70cm and 33cm HAM radio, and any frequency from 240Mhz to 960Mhz is covered.