SJCAM Action Camera SJ8 ProFEATURES Battery Power The SJ8 Pro sports a 1200mAh high capacity battery, it can record 4K 60fps for approximately 90 minutes. That's a whopping 30% improvement compared to all previous SJCAM models. 8X Digital Zoom See the miraculous work of the Ambarella processor and the Sony Sensor IMX377 combined to produce a clean image at 8x magnification. In Built WiFi Switch from 2. 4GHz to the much faster 5GHz on demand to speed up file transfers and other