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This dog whistle app emits sounds at ultrasonic frequencies that dogs can hear but not humans. You can use this whistle to train your dog. Or use it against mosquitoes! Or use it to disperse teenagers, since teenagers can hear certain frequencies that adults can't hear... :-) Features: - change the frequency (pitch) of the sound - change the volume of the sound - choose between different sound types - choose between different pulsed sound modes |
