FINIS Underwater Pace Clock Handy training tool for serious swimmers; waterproof digital clock and lap counter for use during practice and competitions Submergible up to a depth of 16 feet, device has two large LCD digits on ten-by-ten-inch display, showing either lap count or seconds Easy-to-access buttons on the front of the clock let users reset and switch between various modes Additional buttons on top of detachable extension pole utilize infrared technology to transmit signals to base unit Uses one nine-volt battery for 240 continuous hours of operation; integrated flip-down stand for easy, stable placement on deck or below water