Quote Originally Posted by I @ M View Post
Mr. Google says that the RF603 transmitters use 2 x 1.5 volt batteries.

Don't buy the 603 units unless they are 603 ll units.
So assuming 1.5v is fine? Why do you say get the version 2 units? Is that because of the on/off switch being in a better position as well as being able to lock it into place, or something else over the version 1?