Check the listing for details. Adjustable Ultrasonic Power Generator 8 - 40KHz Power Supply 12 - 15V DC. Condition: New. Listed at 29.78 USD. The Kemo M048N is an ultrasound generator designed to emit high frequency sounds - normally inaudible to humans - useful for repelling animals, rodents, insects and parasites. The emission frequency is adjustable over a wide range - from approximately 8 kHz up to 40 kHz - allowing you to adapt the signal depending on the type of animal or pest to be deterred. It operates on 12–15 V DC power and consumes less than 50 mA, for economical and reliable operation. It can drive up to 5 piezoelectric speakers in parallel (speakers not included), so as to cover medium-sized rooms with effective ultrasonic sound. The compact dimensions make the module easy to install even in small spaces, such as garages, cellars, warehouses, campers, stables, gardens, sheds or warehouses. Once connected, it offers.