• S28B Powers up to 2.5 km
• S75B Powers up to 10 km

Ideal for small to medium fence applications.

• 2 Year Warranty
• Fast and easy to set up - Output leads are supplied.
• Fully portable with carry handle and built in battery.
• Thunderbird supply an A.C. mains charger to recharge the internal battery in poor weather conditions.
• Slides straight over a steel post for easy mounting.
• Magnetic switch - no holes through case.
• O-Ring sealed enclosure.
• Low and Hight power levels for battery conservation.
• Cover charging port - keeps weather out.
• System adjusts power in accordance with solar collection

http://www.thunderbird.net.au/solar.htm