YS Competition Electronic Waterproof Stopwatch Timer(Black)1. Memory: single row 2 channels 2. Display: 6 digits 3. Function: stopwatch function, waterproof (can be used in water, buttons can be pressed underwater) 4. IPX8 waterproof, 30 meters deep waterproof, buttons can be operated underwater 5. 99 hours 59 minutes 59 seconds stopwatch timing, 0. 01 second accuracy timing 6. Minimal functions, three button operation, simple and convenient 7. High definition large screen display, made of acrylic plexiglass,