The Casio B640WB-1AEF is a stylish unisex digital watch with a square black stainless steel band. It features a black dial with various functions including a backlight, alarm, chronograph, day/date display, and a 24-hour dial. With a case size of 38.9mm and water resistance up to 50m (5 ATM), this Casio Vintage model combines a casual style with practical features for everyday wear. It comes with the original box and papers, making it a great choice for those looking for a reliable and versatile timepiece.