Onkyo Rc-799m Remote Manual -

Do not expose the remote to direct sunlight, moisture, or extreme temperatures. Clean only with a soft, dry cloth. Do not use rechargeable Ni-MH batteries, as the lower voltage can cause erratic behavior.

Onkyo RC-799M is a dedicated audio/video receiver remote. While it works instantly with many Onkyo receivers right out of the box, you may need to program it to control other devices like your TV. Amazon.com Programming Instructions onkyo rc-799m remote manual