This is a spool of Fiber Optic Cable with slip ring for tethered control systems. It includes the media converters and provides a transparent ethernet connection that is 1km long. Different lengths can be requested.
The InvenSense MPU-6050 sensor contains an accelerometer and a gyroscope in a single chip. It is very accurate, this sensor is used in self balancing robots, drones, smartphones, etc. The sensor uses the I2C-bus to interface with microcontroller.