Inateck 2.4 GHz Wireless Presenter for PowerPoint | Multifunction Wireless / Cordless / Cordless remote control with "Next / Previous slide" buttons for Office PowerPoint presentation, remote control range: 20 m
Hab sought long because I did not want to spend too much money and I'm totally satisfied. There is a one-off button (no unnecessary battery consumption), commercially available AAA battery which is even there. The buttons are silent, only gripe here