I got this for my Birthday Last Year..
The Specifications are:
4 Amps.
2 Amplifier's
Charges Phone to
Compatible with all Samsung,Nokia,SE Phones and iPods!
the adaptor bit just needs changing underneath the phone.
It sooo LOUD its Amazing, price i dont know since i got it as a a Present.
heres the pics, i hooked it up with my W850i:P