Parameters Dial window material type: AcrylicBezel Material: Plastic&AlloyCase diameter: 47 millimetresCase Thickne: 15 millimetresBand Material: TPUBandwidth: 20 millimetresBack cover material: Stainle SteelBand Length: 293mmWrist Circumference: 235mm(maximum); 175mm(minimum) This timepiece features a black plastic case and fixed bezel, a digital display and a matching balck/green TPU strap. Its functions include a day and date feature, an alarm, an hourly alarm, an LCD screen, an EL backlight and water resistance to 50m. Left&Right Button PU Strap Stainle Steel Buckle 5 Bar Waterproof 5 ATM = limited waterproof: The watch can be used in humid conditions, eg in surface water. In principle, you can swim, but it is not recommended. Can be worn in a shower. EL Backlight More options Package Includes 1 x wristwatch(no box)1 x instruction book