- Two different whistle tones+SOS mode selectable by user - Easy to use : operated by single hand - Hand grip strap design for easiler grip on hand. - Addition color ring and lanyard provided (To replacement of hand grip strap if not in use.) - Special design metal-tubing to reach 125dB+/-5dB loudness. - Handy & Hygienic without blowing the whistle - Suitable for all sporting events - SOS mode: Give out S-O-S Morse code automaticall when emergency situations whom indangous and need help. - Multi-propose use suitable for: Referee, Coaches, Traveler, Adventurer, Guides, Cheerleaders,Lifeguards, Teachers, Traffic Guides, Dog Trainer… AAA battery. Is not included in a kit, should be purchased separately.

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Mad Wave’s STOPWATCH 500 is a professional-quality stopwatch. Measures in 1/1000 sec increments. 500 lap memory. Displays numbers of laps, time of each lap and general distance time. Calculates and displays the fastest, slowest and average lap time. Includes calendar, watch, alarm. Memory recall during stopwatch mode. CR2430 lithium battery. Water resistance – 3 bar. Do not use underwater.

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Mad Wave’s STOPWATCH 200 is a professional-quality stopwatch. Measures in 1/1000 sec increments. 200 lap memory. Displays numbers of laps, time of each lap and general distance time. Calculates and displays the fastest, slowest and average lap time. Includes calendar, watch, alarm. Memory recall during stopwatch mode. CR2430 lithium battery. Water resistance – 3 bar. Do not use underwater.

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Mad Wave’s STOPWATCH SW-100 memory is a professional-quality stopwatch. Measures in 1/1000 sec increments. 100 lap memory. Displays numbers of laps, time of each lap and general distance time. Memory recall during stopwatch mode. CR2032 lithium battery. Water resistance – 3 bar. Do not use underwater.

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Mad Wave’s STOPWATCH SW-500 is a digital stopwatch featuring memory and stroke/frequency measuring functions. The stopwatch will withstand accidental contact with water, such as raindrops, but is not designed to work in water. Do not press the buttons if the case of the stopwatch is wet. The stopwatch can measure up to 10 hours in 1/100 seconds. Up to 100/500 split times and lap times can be measured. Large-sized three-row display panel. Accumulated elapsed time / Lap time in progress, split time and lap time are displayed at the same time in separate rows, and they can be measured successively without releasing split or lap time measurement. Up to 100/500 measurements cab be stored in memory, and they can be recalled after measurement in over. Includes calendar, watch. CR2032 lithium battery. Water resistance – 3 bar. Do not use underwater.

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