The Drivall Portable DF100S is a modern design electric fence energiser & is ideal for all small farm uses such as horse fencing, hobby farming, pheasant release pens & electric fence kits. This Drivall electric fencing unit is designed to hang on the tape, it comes complete with an on/off switch & light indicate the unit is working. This fencer is fitted with a replaceable module & comes with 2 year warranty. - 0.03 maximum joules - powers up to 800metres - power source: 2 x 1.5v D type dry cell batteries - battery life: up to 8 weeks with long life batteries