NOTE: The watch works perfectly just has some cosmetic flaws as seen on the pictures. The Samsung Galaxy Watch4 (S/M Wristband) 40mm R860 GPS is a smartwatch designed to provide users with various features such as heart rate monitoring, compass, SpO2, accelerometer, barometer, and gyro. It has a black silicone band material and a 40mm case size. The watch operates on Wear OS and is compatible with Android devices. It has a storage capacity of 16GB and is equipped with GPS network connectivity. The California Prop 65 warning states that the product contains a chemical known to the State of California to cause cancer and birth defects or other reproductive harm.