To use this JULIUS women's wrist watch, simply put the leather band around your wrist and fasten it. You can set the time according to the instructions in the user manual. This watch is 3 ATM water - resistant, so it can handle light splashes like rain or hand - washing, but don't wear it while swimming or in the shower. For maintenance, keep the watch away from extreme temperatures and magnetic fields. Wipe the case and band with a soft, dry cloth regularly to keep it looking new. When the battery runs out after about 3 years, take it to a professional to replace the battery.