Ultrasonic Pet Dog Repeller Stop Barking Train Training Dog Trainer 5pcs

Description:  How does the dog repeller work? It emits a high frequency ultrasonic sound which lets dogs instinctively not come to you any closer.It is the perfect personal protection device and makes a great gift for anyone that encounters dogs on the job or during their outdoor activities.    Features:  Safe, Humane, Effective;  Emits piercing ultrasonic tone that dogs hate;  Works with most dogs;  Can also be used to train dogs;  Stop the dog approaching you before it can bite you;  Keep unfriendly Dogs away.Protect yourself from dangerous dogs while walking, jogging, or bicycling;  GREAT FOR: Joggers, Walkers, Delivery people, Mailman,Meter Readers, Sales people, Bicyclists, Police,Inspectors;  Also can be used a torch;    Specification:  Material:ABS;  Frequency:35-45HKZ  ;  Effective range :Melee Range;  Color: Black;  Size: Approx. 11 x 5 x 3cm/4.3 x 1.96 x 1.18inch;  Power: Uses one 9v Carbon or alkaline battery (not included);    Package included:  5 x Dog repeller