The TAG Heder Aqua racer Professional 200 Solargraph is a new version of a watch made for the outdoors. The first solar-powered TAG Heder integrates the innovative Solargraph module to harness unlimited energy POWERED BY THE SUN Thanks to the Solargraph technology that powers the Calibre TH50-00, this watch offers a host of guaranteed benefits: there is no need to change the watch battery; it is recharged by the sun or artificial light. RELIABILITY DAY AND NIGHT A standout feature of this TAG Heder Aqua racer is its bezel inserts, made of carbon fused with luminous material for maximum readability, day and night. WITHSTAND ANY CONDITION The 40mm black DLC-coated steel case and rubber strap with folding clasp make this versatile watch a life-proof companion for all adventures.