Energizer SG500 Portable Options:Energizer SG500 Portable Measures the most important reef Measures the most important reef aquarium levels Cool burningcompact fluorescent bulbs screw into standard threaded sockets Simple and intuitive · Solar panel and battery integrated in one convenient robust case · Housing for convenient stowing of fence leads when not in use · Single flashing LED indicates fence pulse · Fit and replace the battery with ease Truly portable · Easy to carry portable housing · Allows mounting to existing steel post or wood post Delivers power where it counts · More powerful than comparable energizers · Reliable year round performance in harsh weather · Includes leads for connecting to existing fence · Terminals contain metal insert to ensure robust fence connection Safe and long lasting · Complies with IEC safety standards · 3 year warranty · Rechargeable internal battery included Distance: 30 mi 100a