... cat repeller 2.dog training 3.Ultrasonic:23/32KHz 4.Power: Battery Electronic Ultrasonic Dog Repeller1.dog repellent, cat ... when lighting)Feature & FunctionFeature & Function1.Adopted precise ultrasonic circuit, combined BTL type signal magnifying device, with ... two ultrasonic transmitters. Therefore, the unit can release strong & precise ultrasonic signal, which improves its ...