H-B DURAC Single Channel Electronic Timer with 10-Button Direct Input and Certificate of Calibration (B61700-3500) CE approved, RoHS compliant, Includes Statement of Traceability indicating accuracy traceable to the National Institute of Standards and Technology (NIST) Audible and Light Alarms Counts Up To or Down From Function Pocket clip, Foldaway Stand and Magnetic Attachment Requires two AAA batteries (included)