Got one of these for around $10, works a treat. Small & compact so can just put it in the media cabinet when not needed.
It uses a different IR signal so there is no “red” light when you put the batteries in, but all works fine.
Logitech MK220 Wireless Keyboard and Mouse Set Black
The compact keyboard-and-mouse combo with all the right keys. This clever little keyboard has all the standard keys - so you can save lots of space without missing a thing.
- Package contents: Keyboard (K220), mouse (M150), USB receiver, batteries, and user documentation
- The compact keyboard-and-mouse combo with all the standard keys, extended battery life and reliable, long-range wireless
- Much smaller design, same keys, advanced 2.4 GHz wireless, 128-bit AES encryption and whisper-quiet keys