Troxler PaveTracker Plus Manual Of Operation And Instruction page 17

The gauge features two audible indicators, an internally mounted
beeper, as well as a louder, external one mounted on its underside.
The internal beeper emits a short tone in response to a valid
keystroke on the keypad. It sounds a longer tone when the operator
presses an invalid key or if the gauge displays an error message. The
external beeper performs the same functions, and can be enabled or
disabled as desired by the operator.
A serial communications port is mounted on the front of the gauge.
The serial port is used to output data to a serial device, such as a
computer or printer.
The gauge features two handles. The right-angle handle is used to
move and position the gauge while taking measurements. A second
carrying handle is provided for ease of transporting and positioning
the gauge. An optional telescoping handle (PN 113017) is also
available.
Model 2701-B 1–5