展开Stainless steel case with a black leather strap. Fixed stainless steel bezel. Silver dial with black hands and index hour markers. Arabic numerals mark the 3, 9 and 12 o'clock positions Minute markers around the outer rim. Dial Type: Analog. Date display at the 6 o'clock position. Combination date and sleep cycle (alarm) sub-dial. L285.MMT quartz movement. Scratch resistant sapphire crystal. Pull / push crown. Solid case back. Case size: 44 mm. Case thickness: 9 mm. Round case shape. Band width: 20 mm. Tang clasp. Water resistant at 30 meters / 100 feet. Functions: date, hour, minute, second. sleeptracker, activity tracker, sleep cycle alarms. Additional Info: limited edition of 1957 pieces, provides details on how much time you spent in deep sleep, light sleep, or awake. Casual watch style. Watch label: Swiss Made. Minimum versions supported:iOS 8.0 and Android v4.4.3 (June 2015). Mondaine Helvetica 1 Smartwatch Limited Edition Mens Watch MH1.B2S80.LB.