Easy installation and operation.
No power supply and software drive needed.
Light weight, portable size, easy to carry.
Convenient switch control--just pull the switch point at the relative AV input 1, 2, 3, 4.
You can switch 4-group AV audio-video signal input and 1-group output to the television, DVD, VCD, TV game, VCR station selector, satellite TV, cameras, etc.