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Function&Usage Instruction -Working Principle The M850 anti bark collar uses a voice recognition system to identify its squeak by adjusting the appropriate sensitivity, this will cause sound, vibration and electric shock to stop its barking. -Level Adjustment 1.When you get this product for first time , you need to know the volume of dog and the product identification stystem. Because each dog's voice volume is different, you need to adjust the sensitivity through the"Sound" button (sensitivity from 1 to 9 means the weakest to the strongest). Find the sensitivity level that is suitable for triggering the operation of the anti bark collar. There are 9 levels to operate. 2.The current range of this product is divided into 1-9 levels, through the"Sound" and "Shock" button can adjust the level of vibration and electric shock. For the first time, we recommend that you set the shock intensity to 0 . ,Most of dogs can stop the current behavior by sound and vibration. 3. It will start working when you set the sensitivity and wear it to the dog's neck.






