The Multi-Use Radio Service (MURS) is an unlicensed two-way radio service similar to Citizens Band (CB). Established by the U.S. Federal Communications Commission in the fall of 2000, MURS created a radio service allowing for unlicensed (Part 95) operation, with a power limit of 2 watts.
MURS stations may not be connected to the public telephone network, may not be used for store and forward operations, and radio repeaters are not permitted.
The Multi-Use Radio Service (MURS) uses channels in the 151 – 154 MHz spectrum range. The most common use of MURS channels is for short-distance, two-way communications using small, portable hand-held radios that function similar to walkie-talkies.
MURS is authorized five channels that were previously in the industrial/business radio service and were known as the “color dot” frequencies in Part 90 of the FCC rules.
You may operate a MURS transmitter at any location the FCC regulates radio communications, subject to certain restrictions. A MURS transmitter must be certified by the FCC.
None of the MURS channels are assigned for the exclusive use of any user. You must cooperate in the selection and use of the channels in order to make the most effective use of them and to reduce the possibility of interference.
No MURS transmitter shall, under any condition of modulation, transmit more than 2 watts transmitter power output.
The usual range of communications between MURS stations is less than a few miles; connecting a MURS radio to an external antenna can extend the range to ten miles or more. MURS stations are not allowed to be interconnected with the public switched telephone network. A station identification announcement is not required to be transmitted. Other restrictions on the use of MURS stations also apply.
There are five MURS channels and the channels are either 11.25 kHz or 20.00 kHz each. The channel frequencies and (bandwidth) are:
151.820 MHz (11.25 kHz)
151.880 MHz (11.25 kHz)
151.940 MHz (11.25 kHz)
154.570 MHz (20.00 kHz)
154.600 MHz (20.00 kHz)
MURS is licensed by rule. This means an individual license is not required for an entity to operate a MURS transmitter if it is not a representative of a foreign government and if it uses the transmitter in accordance with the MURS rules outlined in 47 C.F.R. Part 95 Subpart J. There is no age restriction regarding who may operate an MURS transmitter.
MURS range will vary, depending on antenna size and placement. With an external antenna, ranges of 10 miles (16 km) or more can be expected. Full line-of-sight propagation is usually not possible due to the relatively low power restriction of 2 watts.