Digital timers keep track of timing; to trigger an action , to start timing once triggered by an action, or both. Some products are programmable while others may be fixed at a set internal time and function. https://youtu.be/P4u6aTUPFnQ Features: Simple operation, accurate electronic time, accurate timing, durable and reliable cost-effective! Specifications: Model: TEH-48B Output: Relay output Rated voltage: AC 220V Temperature range: 0-99 points Package Includes: 1 x TEH-48B Gas Electric Digital Oven Timer