This unit is microphone activated and has low and high sensitivity settings so even tiny yappers can activate it.

It gives out loud audible tones to deter barking.

IncludesBark control unit with adjustable collar strap Rplaceable battery life approx.

69 weeks InstructionsFeatures and benefitsWeighs less than 50gms.

with collar strap supplied and can be worn by the smallest dogs and puppies Sonic unit is easily clipped to your dogs regular collar High / low sensitivity settings NOT for submersion 2years warranty 10 day money back guarantee to control nuisance barking/noise