main feature 1. The remote control transmitter is flexible and compact, easy to operate 2. The receiver can be used normally when the dog is drinking water or on rainy days, but cannot swim or dive. 3. Vibration and static electricity gears can be adjusted. Please choose the appropriate gear when you use it for the first time. level up. 4.4 functional modes : static/vibration/sound/flash 5. The remote control distance of this pet trainer is 300 meters. (without any interference) 6. There are 2 signal channels, one remote control transmitter can control two receivers of the same model 7. Energy-efficient design, with automatic sleep and memory functions. 8. This trainer is suitable for most small to medium sized dogs.