Lindam Baby Talk Rechargeable
Purchased at Big W for $124
This monitor doesn't have any extra bells and whistles (apart from the nightlight and the termperature display) but it is great if you have bub in another room. We don't really get any interference although there is occasional static, which is usually remedied by placing the receiver in a slightly different place.
The baby unit has the option of mains power or batteries (AA if I remember right) and the parent unit charges up on mains power and then has an internal battery that lasts all day.
Both the baby and parent units have optinal clips on the back, for attaching to cots or clipping to yourself when you are on the move.