Teknique FWD Owner's Manual page 50

The sources of radiated EMI can be broadly classified into three types.
1. Hand-held portable transceivers (transmitters-receivers) with the antennas
mounted directly to the transmitting unit. Examples include: Citizen band (CB)
radios, "walkie-talkie", security, fire, and police transceivers, cellular telephones
and other personal communication devices. Note: some of the above transmit
signals even when they are not being used for communication.
2. Medium range mobile transceivers, such as those used in police cars, fire trucks,
ambulances and taxis. These usually have the antenna mounted to the outside
of the vehicle; and
3. Long-range transmitters that have the antenna mounted upon a fixed tower.
Radio Wave sources may affect power wheelchair control.
Radio wave sources, such as radio stations, TV stations, amateur radio (HAM)
transmitters, two-way radios and cellular phones, can affect power wheelchairs
and motorized scooters (in this text, both will be called power wheelchairs).
Following the warnings listed below should reduce the chance of unintended
brake release or power wheelchair movement that could result in serious
injury.
50 Chapter 10
Other types of hand-held devices, such as lap-top computers,
AM/FM receivers, TV sets, CD and cassette players, and small
appliances such as electric shavers and hair dryers, as far as we
know, are not likely to cause problems to your power wheelchair.
D82007778 REV O 6/10/14