Syma X8HG specification:

Barometer set height: ability to hold desired height aka altitude hold
Wi-Fi real-time transmission: Allows real time image transmission with WIFI connection between the quadcopter and your phone.

2.4GHz control system: strong anti-interference performance and powerful signal.
6 axis gyro: increased flight stability, and improved flight conditions in wind
720P HD camera: take photo or video
360 degrees aversion: easy one button flips, and rolls
Colorful LED light: increased visibility for night flights and orientation awareness

Syma X8HG packing list:

1 x SYMA X8HG quadcopter
1 x color box
1 x charger
1 x transmitter
4 x spare blades
4 x protective ring
1 x Li-po battery
1 x screwdriver
1 x phone support 1
1 x manual