Perfect for those many activities where only basic timing is required. The SC-500E can be used error-free, by anyone, for accurate results. The easiest to use stopwatch ever made. Features: One-step timing for all events. Start-Stop-Reset operation 1/100 Second Resolution to 10 hours. Audible beep confirmation. Color coded push buttons. Use for finish line volunteers or lane monitor timing. 2 Year Battery Life. One Year Warranty.