This hidden fencing system is among the most reliable, cost-efficient pet containment systems available today. A buried wire transmits a harmless radio signal. When you dog approach the boundary, the signal causes the dog's collar receiver to deliver a warning beep first. If your dog continues closer to the boundary, the system will issue a mild shock. If your dog continues further, the system will issue stronger shocks until your dog returns to within the boundary your have set up. Your dog will naturally seek to avoid correction, and is content staying within established boundaries.

Package includes:
2 x Rechargeable Waterproof Receiver
2 x Adjustable Collar
1 x Indoor Wall-Mounted Transmitter
1 x AC Adapter
1 x Boundary Wire
8 x Extra Metal Contact Point
20 x Boundary/Training Flag
2 x Test Light Tool
4 x Screw
1 x User Manual

• Comfortable Waterproof Collar, Proportional Static Shock
• Progressive Warning Tone, Variable Field Width Control
• Audible and Visual Wire Break Indicators, Speed Detect Anti-Run Through
• Multiple Collar Operation, Low Battery Indicator
• Up to 5,000 Square Meters Range (over 1.24 acre), Collar Circumference: 40-65cm(adjustable)

Comfortable Waterproof Collar, Proportional Static ShockUnited States