The Inovonics single input universal transmitter with EOL protection is a universal transmitter with an end of line resistor. The 2.2k ohm resistor (included) is required to operate the EN1210EOL.
The single input universal transmitter with EOL protection is only available in one configuration. Use part number EN1210EOL for 902-928 Mhz North America, 915-928 Mhz Australia, and 922-928 Mhz New Zealand.