The Dogtra DUAL DIAL transmitter is an advanced expandable handheld controller, compatible with the iQ PLUS/iQ MINI, 200C/202C, 280C/282C, ARC, and 1900S/1902S. It is equipped with two sets of dials and buttons for 127 Nick/Constant stimulation levels, Pager vibration, OLED screen, Stimulation Level Lock, and up to 1.5 mile range.