User manual Casio G-Shock GA-110RG-1AER (English - 6 pages)
Amazon.co.jp: Casio watch G-Shock Men's Women's Pair Watch Genuine in pairs Case Pair Watch G-Shock Matching Twins White Coordinate Black GA – ga-110rg-1 a – 1ajf Ga – ga-110rg-1 a – 7ajf
GA 110 G shock Casio - module 5146 - review & detailed tutorial on how to setup and use EVERYTHING - YouTube