bluetooth

• How does Bluetooth use EM waves?

  Bluetooth devices are low power devices which work over a short distance to link one device to another e.g. from a mobile phone to a hands free headset.

  Bluetooth devices have a range of up to 10m.

  Uses short wavelength radio signals so does not need line of sight.

  Bluetooth uses a system of frequency hopping to reduce interference with WIFI as they use similar frequencies.

  Frequency hopping limits data loss.