Brand new shock collar! Voice-activated, the current and warning buzzer are sent out when barking is louder, at the same time the yellow indicator Led turns on for approx. 2 seconds The louder the dog barks, the louder of the alarm sounds,and the faster the frequency of shocks After a time of training, the dog will learn that shock acts as a punishment of barking and thus stops barking Effective and safe training, the electric current of the shock will never hurt the dog Including a testing light between the 2 electrodes, which will turn on when the electric current is sent out For most dogs, it needs 7 to 14 days to take effect; for few dogs, it needs 4 to 6 weeks to take effect; for very few dogs, it needs longer time to take effect Power: 2 / 3 AA battery Dimensions: 80 x 48 x 43 mm Adjustable strap: approx. 25 - 50 cm Note: this product is not suitable for using in noisy environment
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