Designed to keep the helmsman awake. The Last Watch provides a loud alarm after an adjustable time delay. Variable time delay in 5 min increments. Adjustable from 5 minutes to 8 hours.Case: 5.5"L (including brackets) x 3.2"W x 2"H. LED display of countdown timeLoud alarm sounds and red light flashes when not resetKey Lock for securityDiscounts offered by many insurance carrierssecurity