<b>GPS Wireless Dog Fence</b><br><br>This EF851S uses GPS technique to position and measure distance. You need to set the center point and radius and get the collar to position successfully, it works in a circle. During working, the satellite is always detecting the collar's current location. When the satellite detects that the distance of collar from center point is greater than radius, the collar will automatically beep and shock. Once the dog comes back to safe area, it will stop training immediately.<br><br><b>Features</b><br><br>1. No wire or transmitter need, all functions are in the collar.<br>2. The control range is 20-800 meters in radius.<br>3. The shock intensity is adjustable from 1 to 3 levels to fit dogs from 15 pounds to 120 pounds.<br>4. IP67 waterproof and rechargeable collar, charge for 2-4 hours, last for 20 hours.<br>5. The screen can show the preset radius, current distance from center point and shock intensity.<br>6.Stop training for 1 minute between two training cycles; Automatically stop training and return to standby status after 3 cycles.<br>7. Collar size: 2.75×1.75×1.25 inch, 66g; <br>TPU belt size: 0.75×28 inch, 50g.<br><br> <b>Instructions</b><br><br>1. Identify a center point of safe area, it must be outdoors.<br>2. Set the radius of safe area, get it to position.<br>3. Test the boundary and then wear it to your dog.<br>4. When your dog get to the boundary, the collar will beep and shock your dog, then your dog will go back.<br><br><b>Notice</b><br><br>1. Train your dog about 3 weeks to let him know the system.<br>2. Every time you turn on the collar, you need to reprogram.<br>3. Do not use it on aggressive dogs, and don't use it on dogs for over 12 hours per day.<br>4. Do not use it inside a house or near a house or on rainy days due to weak GPS signal.<br><br><b>Package Included</b><br><br>1 x GPS Collar<br>1 x TPU Belt<br>4 x Metal Contact Points<br>1 x LED Test Bulb<br>1 x 5V Charger<br>1 x USB charging Cable<br>1 x English Manual