Brand new in box, never opened. Introducing the SportDOG Brand FieldSentinel 825 with BodyGuard technology – the world's first remote trainer with health alerts. High-drive dogs will prioritize the pursuit of birds over their own health without a second thought. It’s our job to keep them safe. Thanks to real-time monitoring and alerts, BodyGuard technology tells you when to check your dog before a problem ends the hunt. It’s like a check engine light for your dog. Rugged, waterproof design, ½ mile range, quick charge, multi-dog capable, and 3 stim types. Trust in 20+ years of field-proven training features. Hunt smarter, hunt safer.