To select the product's vibration function principle, The dog barks for the first time. The warning sound comes out, the working finger automatically turns on, and the vibration output is the lowest. The dog will respond. The product automatically resets to the starting mode. If the dog does not respond, enter the next function mode. The dog barks for the second time. The warning sound is emitted. The indicator light is on and the light automatically turns on. The vibration is emitted. The dog responds. The product automatically locks the second mode. If the dog does not respond, enter the next function mode. Trigger the dog barks for the third time. The warning sound is emitted. The indicator light is on and the light automatically turns on. The vibration intensity is emitted, and the dog responds. The product automatically locks the third mode. If the dog does not respond, enter the next function mode. The fourth time the dog barks. The warning sound is emitted. The indicator light is on and the light turns on automatically, the vibration is moderately strong and the dog reacts, and the product automatically locks in the fourth mode. If the dog does not respond, enter the next function mode. The fifth time the dog barks. The warning sound is emitted. The indicator light is on and the light turns on automatically, and the vibration is slightly stronger. The product automatically locks in the fifth mode. If the dog does not respond, enter the next function mode. The sixth time the dog barks. The warning sound is emitted, the indicator light is on and the light turns on automatically, the output is the strongest, and the product automatically locks in the sixth mode. If the dog does not respond, enter the next function mode. The dog barks for the seventh time. The warning sound is emitted. The indicator light is on, and the indicator light automatically turns on, the vibration is super-intensified, the dog reacts, and the product automatically locks into the seventh mode. The warning sound output mode is the same as the 7-time vibration output mode, the first time is the shortest, and the 7th time is the longest. If the dog still does not respond, the product will automatically stop working. The working mode will automatically restart after 1 minute, or you can press the switch button to restart. This product triggers work continuously more than 7 times in one minute, and it will automatically stop the protection work to prevent the pet from becoming unsuitable at the beginning. Other product features: 1. The product can be recharged repeatedly 2. The product uses large-capacity lithium batteries, up to 60 days of long-term standby 3. The dog belt has a large diameter of 35 cm and a small diameter of up to 6 cm, suitable for all dogs 4. This product is waterproof and will not be pulled in strong wind or rain, please rest assured to use! Delivery quantity: 1 pieceGood quality product