Pro-Am Digital Stopwatch. Three-row display, shockproof and anti-magnetic, daily waterproof, monochrome backlight Maximum to 300 groups of memories, 1/1000 seconds accurate timing. Week, perpetual calendar, 3 groups of alarms. 1 group of countdown, metronome. High elasticity light touch switch button, crisp and sensitive feeling, with key tone. Battery 1 x CR2032
