PSL-20V Podium Signal Light on September 12, 2015 | Marketing Team Dimensions: 3"D x 4"W x 3"H On board beeper; signal lights front and back Additional signal lights may be plugged into on-board jack. Note: 1 PSL20V is included in a Limitimer System (AV-2000, PRO-2000, PRO-2000RF or PRO-2000BT)