I have two 200w and love these heaters! This heater includes an Electronic monitoring system, thermal sensor, and LCD temperature display. The LCD screen is color coded from the temperature you set it. Green means safe, Red means high Temp, Blue Means low Temp. Another positive is the heater is guarded by a plastic cage so fish can not come into direct contact with the glass (Heater core). The mounting bracket is really nice but is a real pain to remove. I have owned a few different brands and models but this one looks nicer and is really easy to read and operate.