Fuselage

 Plastic Fuselage

Battery

Maxell original Japanese battery. Can run for more than two years

Strap

plastic

Watch case

ABS plastic + original plastic

Waterproof

true 30m depth waterproof 

Function

 stopwatch timing, night light,   date display, waterproof, shockproof, anti-ice alarm, week display, 12 / 24 hour   system, time display