Veterinarian told me 32-62 kHz is optimal. Most cheap devices only hit 25-40 kHz. Check your emitter’s specs before buying!
Be careful if you have hamsters! My daughter’s pet started acting stressed until we turned it off. Rodent vs rodent problems…
Neighborhood group tried synchronized devices across 10 homes. Rodent activity dropped 60%! Maybe area-wide usage is key?
Been using ultrasonic repellers for 6 months now. Pro tip: Combine them with peppermint oil cotton balls - the dual approach works way better than sound alone!
Warning to pet owners! My cat started acting anxious when I installed these. Had to remove them immediately. @MouseFreeMike does peppermint oil bother pets too?
Interesting study from U of Minnesota shows mice adapt to consistent ultrasonic frequencies within 14-21 days. Variable frequency models might be more effective long-term.
These worked great in my garage but were useless in the kitchen - too many obstacles blocking the sound waves. Anyone else notice location matters?
@ScienceGeek1 That explains why mine stopped working after 3 weeks! Just bought a smart repeller that randomizes frequencies automatically. Fingers crossed!
Old-school trick: Place aluminum foil under the repeller. The reflected sound seems to create more coverage in the room. Works better than bare floors!
Can we talk about the buzzing? I can hear a faint high-pitched whine from mine that drives me nuts at night. Anyone else experience this?
@PetLoverSarah Peppermint is generally safe for cats in small amounts, but citrus oils are more effective and pet-friendly for rodent control!
Professional opinion: These work best as part of an integrated approach. Seal entry points first, then use repellers to deter remaining mice. Alone, they’re rarely 100% effective.