This electric dog fence system provides reliable pet containment without the need for buried wires. The transmitter emits a harmless radio signal in a customizable radius from 20 feet to 850 feet around your property. When your dog approaches the boundary, the waterproof receiver collar delivers progressive corrections including warning beeps, vibration, and adjustable shock levels to guide your pet back into the safe zone. The system is suitable for dogs 6 months and older weighing 15 to 120 pounds, with an adjustable collar that fits neck sizes from 9.45 to 22.83 inches. The device features dual functionality as both a containment system and a training collar. In fence mode, one transmitter can connect with multiple receiver collars to protect several dogs simultaneously. In training mode, you can work with up to three dogs individually using separate channels, with 9 adjustable levels of vibration and shock intensity to suit your training needs. Both the transmitter and receiver units are rechargeable via the included micro USB cable, with the transmitter providing 1 to 2 days of operation per charge and the receiver offering 7 to 10 days of standby time. The IPX6 waterproof-rated receiver collar is constructed from durable ABS plastic with a woven strap for comfort and longevity. The portable, wireless design makes this system ideal for use at home, during travel, or at temporary locations where you need to establish safe boundaries for your pet. This product contains components that may expose users to chemicals known to the State of California to cause harm, as outlined in California Proposition 65.