Helps catch all test results. Resolution is one second, accuracy is 0.01%. Each channel has a distinct electronic alarm and display indicator when zero is reached. Alarm is silenced automatically after one minute. Memory recalls the last countdown set time. Sits flat, stands upright or mounts with wall bracket (included). Supplied with a AAA battery and an individual NIST™ Traceable® Certificate. Dimensions: 3.75” x 5.5” x 0.5”.