This is a Y connector. It has a male plug on one end with female pins, then Ys out to two female plugs with male pins. Perfect for having your RC receiver power/control two servos or motor speed controllers from one channel.
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.