overall: 2 7/8 in x 10 1/4 in x 4 in; 7.3025 cm x 26.035 cm x 10.16 cm
The Magellan Systems Corporation produced some of the earliest handheld GPS units for civilian use. In 1986 company engineers began experimenting with electronic mockups. This is the earliest power supply unit. Together with a "breadboard" receiver (2010.0154.01) and a keyboard (2010.0154.02), this object was used to test circuitry and components at Magellan while developing the first civilian GPS receiver.
from MITAC Digital Corporation through Michael Williams