Dimensions: 3"D x 4"W x 3"H
On board beeper; Additional signal lights may be plugged into on-board jack. Note: 1 PSL20V is included in a Limitimer System ( PRO-2000 or PRO-2000BT)
Top lights may be turned off for privacy.  Front digits can be turned off for less intrusive time control or be made to stop counting at 0:00.

Weighs 2 lbs for stability. Weighs 2 lbs for stability.	Other signal lights may be daisy chained for easy connections. Other signal lights may be daisy chained for easy connections.	Used in Congress, courts and city councils Used in Congress, courts and city councils
Set to receive any or all timer programs. Set to receive any or all timer programs.	Top lights may be disabled pro discretion Top lights may be disabled pro discretion	Red light cannot (usually) be ignored) Red light cannot (usually) be ignored)