EXPAND TO 2 DOGS MAXIMUM: Easily add a second pet to your existing setup by pairing this additional receiver collar with your SMART FENCE station. This adjustable collar features a high-visibility orange strap to help you distinguish between dogs and fits neck sizes 11” and up (35–100+ lbs). SMART FENCE CONTROL STATION REQUIRED: This listing includes the additional orange receiver collar only. A Dogtra SMART FENCE control station is required for operation. This unit will not function as a standalone device or with other underground or perimeter electric fence systems. 2-TIER BOUNDARY ALARM COMPATIBLE: Seamlessly integrates with your system’s real-time alarm. Once paired, it triggers loud 85dB station alerts and app notifications the moment this specific dog is near the boundary or has crossed it—all with zero monthly fees or subscriptions. 24 LEVELS & FREE APP CONTROL: Dial in the right level fast with 24 static correction levels + tone + vibration. Use the app to adjust settings, manage alerts, and mute alarms from your phone (Bluetooth). Safe Return stops correction as your dog heads back into the safe zone. IPX9K WATERPROOF DURABILITY: This high-performance collar is IPX9K waterproof—built for rain, mud, and wet grass. It features a long-life battery that runs for days on a charge and supports 2-hour rapid charging so your dog is always ready to head outside. CONSISTENT SIGNAL RECEPTION: Engineered to receive a dependable wireless signal from your station across a 3/4 acre perimeter. The collar maintains clear boundaries across all 5 radius levels, providing reliable coverage for your second pet without fluctuating range. 2-IN-1 REMOTE TRAINING COMMANDS: Send quick training cues on demand via your station or app (Bluetooth). This versatile collar includes removable contact points for those who prefer vibration-only use, providing more control when you need it for boundary safety or training. USAGE & PERFORMANCE: App alerts for this specific collar require your station to be within ~33 ft Bluetooth range. This is a containment system only and DOES NOT include GPS or live tracking. Training flags are recommended to help your second dog learn the boundary faster. DOGTRA QUALITY SINCE 1979: For over 45 years, Dogtra has been trusted by dog owners for high-performance training tools. Our U.S.-based support team is here for setup help and troubleshooting, ensuring you and your pets feel confident from day one. Expand your existing Dogtra SMART FENCE system to a 2-dog setup with the Dogtra SMART FENCE Additional Receiver Collar—a high-performance wireless electric dog fence collar built for clear identification and everyday outdoor use. This receiver features a high-visibility orange strap (easy to spot at a distance and perfect for distinguishing between dogs) and is designed for medium to large dogs 35 lb+. This listing includes the additional receiver collar only; an existing Dogtra SMART FENCE Control Station is required to pair and operate. Once connected, the collar works seamlessly with your SMART FENCE boundary to help create a safe pet containment experience, supporting the system’s alerts when your dog approaches the boundary and when it’s crossed. Customize training and containment to your second dog with 24 adjustable static levels plus tone and vibration options, and take advantage of Safe Return functionality so correction stops as your dog moves back toward the safe zone. Built for real weather and rough play, the receiver is IPX9K waterproof for rain, mud, and wet grass, and it’s powered by a long-lasting rechargeable battery with USB-C rapid charging (about 2 hours) so your dog stays ready for the next outing. Add coverage for the whole pack with Dogtra’s professional-grade quality trusted since 1979—no digging, no subscriptions, just dependable performance for your smart fence system.