superregeneration is most valuable above 27 mhz, and for signals where broad tuning is desirable. the superregen uses many fewer components for nearly the same sensitivity as more complex designs. it is easily possible to build superregen receivers which operate at microwatt power levels, in the 30 to 6,000 mhz range. it removes the need for the operator to manually adjust regeneration level to just below the point of oscillation - the circuit automatically is taken out of oscillation periodically, but with the disadvantage that small amounts of interference may be a problem for others. these are ideal for remote-sensing applications or where long battery life is important. for many years, superregenerative circuits have been used for commercial products such as garage-door openers, radar detectors, microwatt rf data links, and very low cost walkie-talkies.