Has anybody else got a "cyber" wireless keyboard & mouse from The Warehouse?   

I picked one up a few days ago, and while it works fine, the keyboard seems to be continuously transmitting something, which I can tell buy the fact that the receiver's blue light continually flashes several times a second while the keyboard has batteries.

I wouldn't be necessarily concerned, because it works fine otherwise, but it's draining the batteries pretty quick I think.

Anybody encountered this before, is this the "expected" behaviour?

The mouse only transmits when it's active.