Manufacturer Specifications Main Function: Japanese-inspired blue LED digital watch Screen: 72 blue LED lights for time and date display Watch Face: Rectangular 33 mm x 57 mm Bracelet: -Material: Onyx/Carbonate colored metal strap - Length: 170 mm - # of Segments: 20 - Segment length: 8 mm Clasp: Two button safety design Buttons (right-side): - Top (hour and date display + select) - Button (change mode) Settings: Time, Date, Luminosity Power: CR2032 (x2) pre-installed Wholesale Electronics Ref.: WholesaleJB823TRYA6M8 Notes from Manufacturers Similar LED watches sell on the Internet for over 10x theugoos price, simply google "Japanese LED Watch" to see for yourself. This watch is not waterproof Package List CVIZ-G71 Blue LED Watch User Manual - English Notes from UGOOS Customer Service How do I change the time, date, and luminosity on this watch? Simply insert a tapered point into the lower button on the right side of the watch. This will cause the current setting to blink. Continue pressing the lower button until you arrive at the setting you want to change. Next, press the top button to change the information. What type of batteries does this watch use? This blue LED watch uses two CR2032 watch batteries. Other names this type of battery goes by are button cell, silver button cell, or coin cell batteries.