The Junghans Force Mega Solar combines radio-controlled precision with solar-powered practicality in a lightweight, scratch-resistant ceramic round case. It is J615.84 multi-frequency radio-controlled solar movement powers a big date, perpetual calendar, app-connected time sync, and up to 21 months of reserve, paired with luminous dial accents, anti-reflective sapphire crystal, ceramic bracelet, and 50m water resistance.