H-B Instrument 565 Durac Single Channel Digital Countdown Timer with Memory and Clock, 2.6" Width x 2.2" Height This DURAC digital countdown timer features 99hr:99min:99sec count up/down time, individual number keys, and memory Dimensions: 67mm x 57mm (2.6in x 2.2in); has a fold away stand, pocket clip, and a magnetic back Channels: 1; hours: 99; minutes: 99; seconds: 99; accuracy: 10 seconds; memory: yes; clock: yes; uses one AAA battery CE marked and RoHS compliant; features multi-language instructions and comes with a Statement of Traceability indicating accuracy traceable to NIST and DKD Timer is tested and calibrated in H-B's exclusive triple accredited/registered ISO/IEC 17025:2005, A2LA accredited laboratory against equipment whose calibration is traceable to NIST and DKD/PTB