Epson BrightLink 1485Fi 5000-Lumen Pixel-Shift Full HD Ultra-Short Throw 3LCD Interactive Laser Projector - Manual (Page 61)

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Installing Batteries in the Remote Control
The remote control uses the two AA batteries that came with the projector. Replace the batteries as soon
as they run out.
Caution: Use only the type of batteries specified in this manual. Do not install batteries of different types,
or mix new and old batteries.
1. Remove the battery cover.
2. Insert the batteries with the + and – ends facing as shown.