This is a CASIO Baby-G wristwatch. It's 20-bar water resistant and also features SHOCK RESIST. The vibrant blue color is a key characteristic, making it easy to match with casual fashion. This model was developed for running and features a digital model with a large case that's easy to read while running. - It has extensive lap measurement functions, and can store up to 60 stopwatch measurement log data entries. Because it has a shock-resistant structure and 20-bar water resistance, you can use it with confidence in sports and active situations. The instruction manual and case are missing. You can view and download the instruction manual in PDF format by entering the module number "3408" on the Casio official website. The battery is dead. [Brand] CASIO Baby-G [Color] Blue系 (Blue-based) [Functions] 20-bar water resistance, SHOCK RESIST, LAP MEMORY 60 Thank you.