Yes, power 3.6 - 6V. But levels 3.3V. 5V is fine for power but the inputs are 3.3V.
The page that I linked in reply #15 shows the circuit for the voltage divider. That page has lots of good info on setting and using AT mode.
This page has info on using the HC05 in communication mode.
Note: A 2K resistor can be made with 2 1K resistors in series.