FGN Dog Training Collar Manual Automatic Waterproof E Collar, Rechargeable Operation with 800yards Wireless Remote Control AUTOMATIC MODE: FGN dog training collar is designed with automatic mode. You dont need to physically be present to activate this FGN collar with the remote.The automatic mode have 1-7level. Simply choose the appropriate shock and vibration model according to the dogs reaction and then switch to automatic mode. NECK SIZE AND WEIGHT RANGE : FGN dog training collar fits dog whose neck is within 24.7 inches and weigh 4 pounds above. The shock function on this collar is suitable for medium and large dogs.Please dont try it on small dogs (within 4 months).On first use, please make sure the shock and vibration is on a lower setting. REMOTE RANGE :To send a signal to the collar, the remote range of FGN dog training collar is about 1969 feet if no obstacles around. But if there are some buildings or other obstacles around, the remote range is between 820-985 feet. CHARGE TIME:The batteries on both remote control and receiver last quite a while, and both are quick to charge. For best results, please charge the remote and the receiver for half an hour each before using the first time. In order to lengthen the battery using time, it is advisable to charge the remote and receiver every week. WARRANTY ON THIS PRODUCTFGN dog training collar comes with One year warranty. If you have any issue about the item you receive,please feel free to contact us. We are here to offer you the best after sale services.