Exceptional in design. This perpetual calendar is radio-controlled in 26 cities, boasts a 1/20-second chrono that measures up to 60 minutes, and power reserve. Shown in stainless steel with black ion plating. Featuring our Eco-Drive technology – powered by light, any light. With a Non-Reflective Sapphire Glass. Water Resistant to 200 metres. Never needs a battery. Caliber number H800.*Please note that the radio-controlled functionality will not work in Australia due to the absence of radio transmitting stations within range. These stations are exclusive to four regions: Europe, USA, China and Japan. However, this does not affect manual time adjustment. Please refer to your instruction manual for guidance.