Wireless Dog Fence Mode: This dog receiver collar can be paired to our wireless dog fence of GPCT4117 to limit your dog in a specified space and keep it safe. Remote Dog Training Mode: After connected with our wireless dog fence of GPCT4117, you can also simply press sound/vibration/shock button to send different punishments to the corresponding dog via every single channel and train your dog. (Max 3 channels) IP65 Waterproof Receiver: The receiver collar is IPX6 waterproof, which allows your dogs to get wet in the grass, mess with the sprinkler or play in the rain. Adjustable & Reflective Collar: The collar can be adjusted from 9.45in to 22.83in to fit most sizes of 6-month+year old dogs between 15-120LBS. Reflected strips on the collar enable you to see your dogs clearly even at night which effectively keep your dog safe. USB Rechargeable & Portable: Built-in 400mAh rechargeable batteries, the receiver collar can be recharged via USB cable about 1-2 hours for fully charged. Great for taking outside for camping, vacation homes, or anywhere you travel.