Citizen Eco-Drive chronograph is your perfect accessible pilot timepiece with definite classic appeal with a dress edge found in the black calf leather strap, black dial, stainless steel case and green bezel, topped with a mineral crystal glass. Featuring an array of aviation level functionality such as Eco-Drive technology powered by any form of light, a thin bezel with a wide dial for better visibility and luminous markings. Armed with base 30 pulsations for high accuracy heart rate count. This method is one which is used medically to measure heart rates both quickly and accurately. Start counting the heart rate for 30 beats from the 12 hour marker. When you reach 30, where the second hand points is the heart rate. Secondary functions include date, 12/24 hour time, water resistance to 100m, ideal for swimming and snorkelling.