WORLDS MOST RELIABLE GPS FENCE TECHNOLOGY: Our patented AccuGuard tech blends GPS data with real-time movement to help keep your pet secure and safe. NO SUBSCRIPTION: Experience a wireless GPS pet fence free from monthly subscriptions. WIRELESS SETUP MADE EASY: Get your virtual fence up and running in as little as 1 to 2 hours with no digging or burying wires necessary; Wi-Fi required for setup, (Only compatible in the United States). LONG LASTING COLLAR BATTERY LIFE: This durable, waterproof collar sports up to 3 days (72 hours) of battery life on a single 4-hour charge. PERFECT FOR MOST DOG SIZES: Designed to accommodate dogs over 10 pounds with neck sizes ranging from 8-26 inches. SMART CONNECTIVITY: Use the My PetSafe app to seamlessly set your custom GPS boundary, monitor battery life and adjust static correction levels. COMPREHENSIVE TRAINING GUIDE INCLUDED: Set your pet up for success with our included 2-week step-by-step training guide. EXPAND YOUR GUARDIAN GPS FENCE SYSTEM: Add up to 5 compatible collars to your system and always have an extra battery on hand for when you need it.