Available in different plug standards and variation in number of sockets, each unit has an integral circuit breaker and fault indicator. The professional range is equipped with a thermal disconnect device which disconnects the high capacity metal oxide varistors from the mains if over-stressed due to frequent high energy surges or long over voltage conditions. If the thermal disconnect triggers, it will also automatically disconnect the power as a further precaution. The professional 2000 has increased filtration and upgraded status indicators.