《EASY TO USE AND ACCURATE STOPWATCH WITH LAP TIMES AND ALARMS》 Capture both the lap and split times with the ability to store 100 memories for events. The Timing interval is 1/100 Second, it is perfect for any kind of sport events and also daily life. It is equipped with IPX7 Waterproof rating which means it can be submerged up to 1 meter in water for 30 minutes, it can be used in the any water environment. Extra large LCD display with the orange backlight features for great viability even in dim light 《CONTROLLING OPERATION SOUNDS ENVIRONMENTALLY》 Does the sound of people tapping or clicking annoy you? Some people would say, "YES". The Dretec stopwatch has a sound control button to turn ON / OFF. Simply turn off the sound in the public places, such as library, classroom or cafe. 《STOPWATCH WITH LAP AND SPLIT MEASUREMENT FUNCTION》 Up to 100 measurements can be stored in memory, and they can be recalled with the fastest lap, slowest lap and average lap time, also can recall each split/lap time in order. 《3-ROWS DIGITAL IN THE DISPLAY LARGE SCREEN》 Lap time, split time and the total continue-moving time are displayed in the same screen with three separated rows. It is suitable for sports coach, easy to view time and record date. 《PRODUCT DETAILS》 Product size : 2.2 X 0.8 X 3.2 inch (58 X 21 X 83mm) The Timing interval : 1/100 Second Water proof : IPX7 - Can be submerged up to 1 meter in water for 30 minutes Available functions: lap time / split time / the total continue-moving time / timer / countdown / alarm / calendar / 100-measurement storation Package inclusion: 23 inch (60cm) long strap