Digital Clock Gauge for Any Semi, Pickup Truck or Car - Bezel: Chrome - LED Color: Blue Lithium battery keeps time even when power is lost (display only active when power is on) Extraordinarily accurate: Plus or minus only 1 minute per year Mounts in the standard 2 1/16" hole which fits most dashes. If no 2 1/16" mounting hole, can install in mounting bracket, display or pillar. Lifetime warranty, excluding abuse