Yamaha YRS-2500 Owner's Manual page 87

Preparing remote control
Before installing batteries or using the remote control, be sure to read battery and remote control precautions on the page 2.
Installing the batteries
Press down on the arrow
and slide the cover in the
direction in which it
points.
16
Installation
En
Battery × 2
(AAA, R03, UM-4)
Slide the cover back to close it.
Operation range
Within 6 m