Our medic-friendly chronograph is now in steely grey with warm blue-green sub-dials to feast your eyes on while measuring pulse rates and respiratory counts.Utilizing an ultra-tough and super light 38mm titanium case, powered by a SII VK64 mecaQuartz chronograph movement, the watch face has clearly marked indexes and specific pulse-tracking functionalities. Pulse rates per minute are generally counted in a 15 or 30 seconds window; this watch uses a 30 seconds count as it gives a more accurate reading. Have fun out there in the field!  SPECIFICATIONS: Case: 38mm Titanium Case Movement: Japanese SII VK64 Battery type: 394 SR936 Water Resistance: 200m (660ft) / 20ATM Crown: Screw-down crown with custom embossed BOLDR logo Dial: Printed matte dial with Japan Superlume Hands: Custom hands with Japan Superlume Lens: Flat sapphire crystal with anti-reflective coating Strap: Nylon NATO strap with custom titanium buckles Case Thickness: 12.2mm Lug size: 20mm Lug to lug: 44mm Case Back: Screw-down caseback with embossed limited edition designer artwork