How to test whether electric shock is effective? Use the test lamp to touch two silicone tips at the same time, click the electric shock button, the test lamp will light up and the electric shock will work. Note: be sure to touch 2 silicone tips to form a circuit. Here are some suggestions for you. 1. Avoid leaving the collar on the dog for more than 12 hours a day. The collar on the pet's neck may be repositioned every 1 to 3 hours. 2. Check the cooperation to prevent excessive pressure; Please follow the user manual. 3. Follow the user manual. Check the contact area daily for signs of rash or pain. Please don't make the pet's collar too tight. 4. Silicone cap can make the pet's collar softer. 5. Check the skin condition of the dog every day. Strictly follow the product use recommendations. The collar is safe for your dog. Each dog's training collar is made of the highest quality materials and adopts the best manufacturing technology.