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Ultrasonic sounds are believed to inhibit rat and cockroach infestations. The FK929 produces a penetrating signal of 10-33kHz which it disperses through an efficient piezo loudspeaker which is included in the kit.
Technical Specification Power Supply : 9VDC @ 48mA max. Frequency : Adjustable over the range 10kHz- 33kHz PCB Dimensions : 2.11" x 1.66" x 0.8" (53.6mm x 42.2mm x 22mm) Recommended Housing : FB01