The Casio G-Shock GBM-2100-1AER is a durable timepiece featuring a 44.4 mm stainless steel case with a bio-based resin band. It offers shock resistance and 200-meter water resistance. The watch is powered by Tough Solar technology and includes Bluetooth® connectivity for smartphone linking. Additional features encompass world time, stopwatch, countdown timer, 5 daily alarms, and a double LED light. The black dial is protected by mineral glass and displays both analog and digital time. Reference number: GBM-2100-1AER.