The FCC regulates the power of all R.F. transmitters. Our transmitters fall into the category of "Low Power Transmitters". This category is limited in range so no user license is required for operation.

While we have tested our transmitters and received signals at a distance of 1/4 mile, range can vary widely depending on the specific application. In actual operation, the transmitter sends a data stream to the receiver when a button is depressed. The receiver must receive the same data to respond to the command. If erroneous data is received, the receiver ignores the command. Thus, the shorter and simpler the data stream is, the more likely the data will be received correctly. The data stream becomes longer and more complicated as the number of functions increases or if multiple receivers must operate in the same area.

R.F. noise and interference will also effect range. The greater the distance between the receiver and transmitter, the weaker the signal becomes and the greater the likelihood that noise or interference will prevent a valid signal from being received.

Another factor that will affect range is the location of the receiver. For example, if the receiver is located inside a closed steel building and the transmitter is outside, the R.F. signal will not transmit as far as it would in open air.

The type of control required also is a factor in range. A typical garage door opener uses a single pulse to activate the receiver. Limit switches then determine direction and duration of travel. This type of control is called intermittent duty. A continuous duty signal is one where a switch on the transmitter must be pressed continuously during the entire duration of an operation. It is much easier to transmit a single intermittent pulse to a receiver and thus the range will be much greater for this type of transmission.

Typical transmission range will be in the area of 100 feet for a keyfob transmitter & 300-400 feet for a full size transmitter.