KeyRF Remote Control 

The KeyRF provides a convenient way to use a remote control with your PC. Use
the KeyRF to control your overhead or laptop presentations. The KeyRF works
with PowerPoint and any other presentation software. It's simplicity, and
ease of use makes it the ideal choice for business presentations. See the
special offer celibrating Microsoft's choice of the KeyRF for their
presentations. For 2 or 4 button KeyRF systems with an extra transmitter. 

Home automation systems make use of KeyRF control. Embedded PC applications
can add reliable remote operation without any extra software.  

The RF technology of the KeyRF system provides greater range than other
infrared remotes. The transmitter doesn't require being pointed at the
receiver, has a 360 degree reception area, and it works with objects or
people positioned in the transmission path. Easy connection to the keyboard
port means no special software is needed on the PC.  

http://www.l3sys.com/keyrf/keyrf.html