G-SHOCK digital wristwatch with GPS, heart rate monitor, and smartphone link function. - Brand: CASIO - Model: G-SHOCK - GPS Function: Yes - Heart Rate Monitor: Yes - Smartphone Link: Yes - Water Resistance: WR20BAR - Charging Method: Solar charging and USB charging - Accessories: Instruction manual, charging cable Thank you for viewing. I used it for about a week, but the size is a little too big for me, so I'm selling it. There are no noticeable stains. A screen protector is also attached. Rui Hachimura