Personalize your tracker with accessories in a variety of styles, plus choose from dozens of unique clock faces. Accessories are sold separately. This smart sports watch features a black synthetic strap and a black plastic digital dial. Its shape is a rectangle. Its case is made from ceramic. It has a water resistance of 50 meters. It has a foldover clasp. Its lithium-ion battery has a life of more than 7 days. It features Bluetooth V4.0. It features a chronograph, scratch and dust resistance, pedometer, heart rate monitor, activity training, weather functions, customizable watch face, AMOLED screen type, and sensor. It has no call function and internal memory. It is a watch OS. It has a display resolution of 320 x 320 Pixels. Its glass type is Corning Gorilla Glass 3.It has a wired charging and hard case. It is compatible with Android and iOS. It has no Wi-Fi, Flight Mode, Gyroscope, Altimeter, Microphone, Barometer, Voice Recognition, Compass, Caller ID, and GPS Tracking. It features Notifications, Alarm Clock, Touch Screen, Sleep Monitor, and Step Count. It comes in one size with product weight (Gms): 40, case thickness (in mm): 16 mm, diameter (in mm): 16 mm, and strap width (in mm): 17 mm. Only use fresh water and a soap-free cleanser (like Cetaphil) to clean the band. It features a 1-year warranty. Customer Care Number: 8000501057 or write us on support@fitbit.com