Product Name: Wireless Electric Dog Fence The max control radius of the wireless pet fence with the center of transmitter is 200m Adjust the signal intensity by pressing 1 4 scales, the corresponding distance of receiver is 50 200m, which means 50m for 1-scale and 200m for 4-scale AC powered for the transmitter and built-in rechargeable Lithium battery back up IP67 Waterproof Receiver " One transmitter supports several receivers to work simultaneously 2 Training modes : Sound Shock 1. Please keep the AC power in for the primary power supply. 2. 1000mAh rechargeable Lithium battery built-in for back up while the AC power cut , it will last about 10 hours max. 3. If the transmitter is down or crashed unexpectedly, you could press the Reset hole with toothpick to reset it. How to quickly pair the transmitter and the receiver if they're unpaired? 1. Press and hold power button of the Transmitter for 2 seconds to turn it on. 2. Press power button of the Receiver to turn it on. 3. Press and hold the fence setting button of the Transmitter for 2 seconds, then the dotted line box of the LCD screen keep flashing and the Receiver sound bi-bi, which means the wireless fence function is ON. Package 1 x Wireless Transmitter 1 2 3 x Wireless Receivers 1 2 3 x Neck Straps 1 x DC-USB Charging Cable 1 x Power Adapter 1x 4-Pack Metal Contact Probes 1 x LED Test Light 1 x User ManualRemote control range: up to 200 meters in radius,Compatible pet neck circumference: 0-25",Water-resistance level of collar: IP67. Supports controlling multiple dogs (up to 3 dogs) simultaneously with one transmitter.Each receiver comes with 2 sets of metal extension contact probes Suitable for all types of dogs, small medium and large with neck circumstance up to 25". One button transmitting signal level adjustment from 1-100 to adjust range covered.Clear digital display shows the current transmitting signal level. Easy setup via wireless pairing, no more digging and burying wires Beep tone alert and progressive static shock correction once the dog goes excess the preset range( up to 200m). Wireless Electric Dog Fence System Rechargeable Waterproof Training Collar with 1 2 3 Collar Wireless Electric Dog Pet Fence.