2 ways to charging the item (the item with DC Charger Cable). Power 1:Solar panel charging. Power 2:electric DC charging. Recommended to be charged continuously on DC power for 12 hours before first use. Discharge energy: 0.35J. Output voltage: 8kV (+/-1.5kV). Fence length: Up to 10km. Solar panel: Monocrystalline silicon. Solar panel size: 11 x 9.5cm x2. Solar panel output: 1.8W x2. Charge voltage: 5V DC. Battery: 3.5V 10Ah Lithium. Dimensions: 19.5 x 17.4 x 16.1cm.