Taser X3 - Manual (Page 16)

Step 12: ARC Switch
Pressing the ambidextrous Arc display/Re-energize/Cartridge advance (ARC) switch supplies
additional energy to the target. The ARC switch is also used to employ a drive-stun or a
Warning Arc display, select cartridges, and select menu items during system programming
and option selection.
If you need to select a specific cartridge (e.g., the X3 ECD is loaded with two 25-foot and one
35-foot cartridges and you need to select the long-range cartridge), press and release the
ARC switch to advance the cartridge selection.
If the ECD is in the manual deployment mode, quickly press and release the ARC switch after
deploying a cartridge to advance the cartridge selection.
ARC Switch