Logitech, Digital Presenters, models:

931342-1914 - Cordless 2.4 GHz Presenter Presentation Remote Control	Installation
966167-0403 - Cordless Presenter	Setup Manual
C-U0001	User Manual
C-UR37	User Manual
Cordless Presenter	Quick Start Manual
R400 - Wireless Presenter Presentation Remote Control	Setup Manual
R800 - Professional Presenter Presentation Remote Control	Setup Manual