Bering - 51840-077 - Mens Radio Controlled. Extremely precise, radio controlled quartz clock with automatic summer / winter changeover. The housing is made of shiny, gray steel and has a diameter of 40 mm. The watch glass is made of scratch resistant and crystal clear sapphire crystal. The mesh bracelet has a width of 22 mm and includes a longitudinally adjustable clasp closure. The clock is water resistant to 3 ATM.