H-B DURAC Analog Copper Chromium Plated Stopwatch; 30 Minute, 1/5 Second Intervals (B61700-5100) Analog stopwatch accurately measures spans of time using the crown stopper to start, stop, and reset the clock Ring accepts a lanyard (sold separately) to free a user's hands while keeping the stopwatch within reach Time is accurate to 0.2 seconds Construction: Copper chromium plated Includes multi-language (English, French, German, Italian, Portuguese and Spanish) instructions.