its very cool, easy to set up, but mine didnt have a microphone like it says it does.
No way does it work to 100 metres, about 20m through a house from upstairs to downstairs.
Overall very nifty, but dont waste 50 quid on it if you're not really sure or if you use all your birthday or christmas money to buy it.
And it's not proffesional quality.
But it's very cool and does what it says apart from the microphone :D