Three-Key Stopwatch is so inexpensive that its the first disposable stopwatch. Appropriate for easy-duty, occasional-use needs. At only ⁷/₈ ounces, its the lightest of all stopwatches. Wear it around your neck on the lanyard and never know its there.

To assure accuracy an individually serial-numbered Traceable Certificate is provided from Control Companys ISO/IEC 17025 (1750.01) calibration laboratory accredited by A2LA. It indicates traceability to standards provided by NIST (National Institute of Standards and Technology). Times to 24 hours with a resolution of 1/100 of a second for 30 minutes and 1 second thereafter. It also displays time and date. Provides a sound confirmation each time a key is pressed. Supplied with a Traceable Certificate, 1-year battery, and lanyard. Replacement battery Cat. No. 350-19933.

Specifications:
• No. of channels/zones: 1
• Timing capacity: 23 hours, 59 minutes, 59 seconds
• Timing accuracy: 0.01% accuracy
• Timing resolution: 0.01 second
• Memory: No
• Count up / countdown: Count up
• Dimensions: 2¹/₈ x 2¹/₈ x ⁵/₈ in.
• Weight: ⁷/₈ ounce
• A/C plug: No
Image(s) are representative of the product group and not necessarily the individual product.