Features1Alarm Sound: This electric fence charger will sounds when the fence fails. Direct current and alternating current can be switched. 2Practical Indicator: When the power indicator of the main unit is on, it means the power is on. High voltage pulse indicator light, this light flashes when normal. When the fault light is on, it means that the fence or the host is faulty. 3Display Screen: The screen can display the voltage and quantity of power supply or battery in real time. When the voltage is lower than 12V, the machine will alarm and stop working in order to protect the battery from overdischarge. 420 Kilometers: This electric fence charger is capable to control an area of 20 kilometers, meeting your needs. 5Prevent Intrusion: This electric fence charger can prevent wild animals such as bears, raccoons, skunks intruding on the domestic ones.SpecificationItem Type: Electric Fence ChargerMaterial: ABSProduct Size: Approx. 24 x 12 x 7.5cm / 9.45 x 4.72 x 2.95in ( Manual Measurement, Slight Error May Exist )Bottom Hole Distance: Approx. 22 x 7cm / 8.66 x 2.76in ( Manual Measurement, Slight Error May Exist )Input Voltage: DX12VOutput Voltage: 8KV/12KVPulse Period: 0.75S-0.3SOutput Energy: 5JAlarm: YesCable Length (The Longest Cable Distance): 20,000 MetersVoltage: 100-240VSpecifications: 20km Alarm HostUses: Animal Husbandry ProtectionApplicable Scene: OutdoorApplicable Animals: Pigs, Cows, Sheep, Horses, Pigs, Dogs and Other AnimalsThe Working Principle of the Electric Fence: the High-voltage Current Generated by the Electric Fence Pulse Controller Forms a Loop Through the Wire-animal-earth-host.Electric Fence Use and Benefits: Perhaps the Most Widely Recognized Method of Animal Control is the Electric Fence System. Electric Fences Not Only Control Domestic Animals and Livestock, but Also Have Many Important Uses, Including Confining Wild Animals Type Groups of Animals, Allow Crop and Forage Rotation, Isolate Animals from Trees, Rivers, Roads and Damaged Land, Electric Fences Have Enabled Newer Grassland Management Techniques, Better Grassland Management is Better for Pastoralists , Fixed and Movable Electric Fences Are Used for Grassland Zoning to Ensure the Uniformity of Grassland Grazing and Animals on the Grassland; Only in This Way Can the Forage Keep Freshness and Good Palatability, As Well As Maintain the Appropriate Height of the Grass, and Ultimately Play a Role in Increase Milk and Meat Production in Grasslands.Function:(1) Dc12v: 12 Dc Input Socket, Need to Use 12v Power Supply of Not Less Than 2a, You Can Also Use the Battery Cable Provided with the Machine to Directly Use 12v Battery Power Supply, if You Use 220 Ac Power, You Need to Use a Power Converter (the Machine is Already Equipped) , 220 Ac Power Must Be Equipped with a Leakage Protector, or a Small Current Leakage Protector Installed Separately for the Power Converter of the Machine.(2) Pulse Adjustment: the Pulse Cycle Adjustment Knob, Rotate This Knob to Adjust the Pulse to Form a Discharge Cycle Between 0.75 Seconds and 0.3 Seconds(3) Alarm: Alarm Output Socket, Output 12v when Alarming, Used to Connect Alarms with Power Less Than 10w, if You Need to Connect Alarms Larger Than 10w, You Need to Connect an External Relay Control Power Supply to Supply Power to the Alarm. Directly Connecting an Alarm with a Value Greater Than 10w Will Burn out the Circuit Inside.Package List1 xElectric Fence Charger 1 x Power Adapter 1 x Battery Clip (Pair) 1 x Alarm 1 x User Manual