Some GPS do have a microphone and listening device. Some GPS do
not have this.
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With a GPS device.
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No. A GPS device is a receiver . . . it does not emit or
transmit anything.
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The cheapest personal GPS tracking device is the Bushnell GPS.
These GPS cost around $50. You can purchase the Bushnell GPS online
from stores such as Best Buy.
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A hand held GPS is certainly a portable electronic device.