The Citizen Eco-Drive CB0240-11L Promaster, designed for professional use to help you push your limits, enhances your watch collection with the latest Promaster Sky model. Built to withstand daily wear, it features a light brown calf strap, a sleek blue dial accented with yellow, sapphire glass, and a 42.4 mm case. Its performance is enhanced with a perpetual calendar, radio control (excluding Australia), world time for 26 cities, an aviation slide rule inner ring, and a cockpit dial design. Powered by Eco-Drive technology, it operates indefinitely with any light source, eliminating the need for a battery.* *Note: Radio control functionality is not available in Australia due to the absence of compatible radio transmitting stations. Manual time adjustment is required, as detailed in the instruction manual. - Calibre H145 - Radio Controlled - Perpetual Calendar - World time (26 cities) - Anti-magnetic 4800 A/m - Daylight Saving Function - Date - Automatic Hands Correction - Insufficient Charge Warning Feature - Power Saving Mode - Slide Rule - Low Charge Indicator - 2-Year Power Reserve (in power save mode). - 42mm Case Size - Stainless Steel Case - Leather Strap - Sapphire Crystal - 200 Meters Water Resistant