POFET4pcs Waterproof Tweeter Piezo Treble Piezoelectric Speaker Ultrasonic Type

POFET 4pcs Waterproof Tweeter Piezo Treble Piezoelectric Speaker Ultrasonic Type for in repellers, bird repellers, dog training devices

Kemo M048N Ultrasonic Generator Repels Animals, Birds and Insects. For Connecting Piezo Speakers. For Mounting in Storage Rooms, Kitchens, Warehouses, Gardens