The C500 Plus arrives with a SIM and Micro SD card-supported slots. SIM connectivity allows this watch to access the cellular network and enables the watch to make / receive calls as well as reply to messages. Furthermore, it helps to track GPS locations by accessing the internet. And, an external SD card slot allows for storing anything essential to the device. However, this C500 has a 0.3MP camera, Bluetooth, heart rate, blood pressure, and oxygen monitoring sensors.