Fisher & paykel ActiveSmart™ counter-depth bottom freezer features fast freeze, LED lighting and Sabbath mode. ActiveSmart™ consists of a microprocessor, interior temperature sensors, independently controlled variable speed fans and multiple air ducts. The microprocessor controls how the refrigerator operates based on changing patterns of use. The sensors continuously send information to the microprocessor, which analyses and adjusts the fan speed and compressor operations accordingly to deliver a consistent and stable temperature. Continuous feedback means that ActiveSmart™ adjusts to the way you live. Its ability to respond to daily use means that it only uses the energy needed to keep your food fresher for longer.