Multi-frequency radio-controlled solar movement J615.84 with autoscan, display for big date, sleep-mode: after 72 hours, power reserve: 21 months, luminous hands, stainless steel case with ceramic topring Ø 41.6 mm, pusher lock by slider, sapphire crystal, PU–strap with stainless steel buckle, water-resistant up to 10 atm.