Specifications
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Feature Specifications
Keyboard layout Standard IBM layout
Plug type Universal Serial Bus (USB)
Length of cable 5.8 feet
Dimensions
(length × depth × height) 		472.5 mm × 196.71 mm × 38.67 mm
Power consumption Less than 0.3 Watts
Operating voltage 5±0.25 VDC
Power consumption Less than 0.3 Watts
Environmental Operating Specifications
Temperature from 5° C through 40° C
Humidity Relative humidity under 80%
Altitude 2300 meters
Environmental Storage Specifications
Temperature from –25° C through 55° C
Humidity Relative humidity under 95% without condensation
Non-operational shipping from –40° C through 60° C
Altitude 4580 meters
Meets FCC Class B Emission Limits
Self test

Immediately after the computer is turned on, the keyboard runs a self test. The self test consists of a checksum test of read-only memory, as well as a read/write test of random access memory in the microprocessor of the keyboard. At the beginning of the self test, all light-emitting diodes (LEDs) light up, then flash for a few seconds before the self test ends.
Keyboard buffer

A 16-key first in/first out (FIFO) buffer stores the scan codes until the host is ready to receive them. Buffer overrun occurs when more than 16 keys are stored without being sent. An overrun code replaces the seventeenth key to be stored in the buffer. Pressing additional keys will result in the loss of data, if the host is kept busy and the keyboard is unable to send out the contents in the buffer.