Does the IPhone 6/6Plus/7/7Plus/8/8Plus/ IPhone X Fit? Ans: Yes! Definitely
Is it 220v ? Ans: 220 volts? No its not runned on any electricity, it enhances your phones image and it does a good job on the galaxy s7. Hope that was your question.
Does it magnified sound too? Ans: No, just picture not sound
Can you use your head phones with it Ans: Yes, if they plug in at the top or bottom of your device and the lead is long enough. There's a hole provided in the slide-in case for your device, which lets you trail the lead out of the main box (although it's marked as a slot for the power cable, which makes little difference if you don't need to charge).