The main function of the product: In the previous product upgrade, the cumbersome reset function was avoided 1. Function: prompt warning sound + vibration + sensitivity adjustment, charging + waterproof 2. Press and hold for 0.5 seconds to turn on, long press to turn off, 7-speed sensitivity adjustment, 3 indicators are on at the same time, 7-speed, 1-6 steps and so on. Other features of the product: 1. The product can be recharged repeatedly 2. The product uses a large-capacity lithium battery for up to 60 days of long standby 3. The diameter of the dog belt is 35CM, and the diameter can reach 6CM. It is suitable for all dogs. 4. This product is waterproof, do not shoot in strong winds and heavy rain, please rest assured to use!C