I can provide specific instructions for or adjusting the stimulation range (Low/Medium/High) if you'd like. SportDOG 425 E-Collar Review
Ensure the collar is charged and the contact points are touching the skin. Use the included Test Light Tool to verify the collar is receiving a signal; it will glow when a stimulation button is pressed.
Start at Level 1. Slowly increase until your dog shows a slight physical reaction (e.g., ear flick, looking down). This is your starting point.