Intelligent Identification Chip: The microprocessor intelligently detects the dog barking technology, which can safely and effectively filter other unrelated sounds and prevent false triggering. | The receiver is designed with a digital display to show the level, and red light for "beep + vibration + shock" mode, green light for "beep + vibration" mode, each mode has 1-7 adjustable intensity levels. | New Smart Test Mode: When the sensitivity level is adjusted to 0, the receiver enters the test mode, and you can test by blowing or shouting at the sensor microphone on the back of the receiver. When the receiver makes a sound, and then vibrations and finally shock (Test light will be on), it means the receiver works fine. | Intelligent Dual-Mode and Automatic Protection System: The dual training mode is beep+vibration, and beep+vibration+shock. In Non-Shock mode, as long as dog barking is detected, it will trigger; In Shock mode, if dog barking continues, the device will perform six different steps in turn, sleep for two minutes after the completion of six steps, and return to the initial state to protect the pet. In Automatic Protection mode, press any button to allow the product to re-enter work mode. | Rechargeable & Waterproof: The collar contains a built-in USB rechargeable battery. It can be fully charged in about 2-3 hours and gave you 10-15 days of use. IP67 waterproof level design and suit for dog swimming in summer and shower. The waterproof charging interface is designed more durable.