Digital clock. Can be set in 12 or 24 hour format. Accuracy is +/- 1 minute a year. Gauge has a lithium replaceable battery for back-up so it will not lose time if power is lost. Mounts in a std 2-1/16" gauge hole. Lifetime warranty to the original purchaser, excluding abus and back up battery. Made in the USA by TELTEK. Please call for complete listing of TELTEK digital gauges.