A special purpose programmable Interval Timer which will turn on the lights and the horn in a desired sequence to indicate progress in an activity or a process. Shows hours and minutes. Time intervals may be from 1 minute to 99 hours and 59 minutes. Programs as a standard Protime Interval timer (See CC8152-T01) with the addition of the horn and light patterns. Horn and lights are selected with the A, B and C keys during programming. Commonly used for announcing completion times for production ovens and baths. Shows green light in A interval, yellow light and intermittant horn in B interval and red light with continuous horn in a C interval. This allows the final period to be programmed in a way that is sure to get attention such as requiring a manual shut off. Shows time of day when it is not timing a program.