RocketFish RF-RBUSB User Manual page 19

2
Aim the remote control at the IR sensor on the front from a
maximum distance of 23 ft. (7 m) away and a maximum angle of +/-
30 degrees from the center line.
To replace the battery:
1
Press the battery tray lock to the right, then slide out the battery
tray. You can remove the battery door with your fingernails by using
the spaces set back in the remote control.
RF-RBUSB 19