Expand Your Training System: This SportDOG Brand WetlandHunter Add-A-Dog Collar is compatible with the WetlandHunter 425X (SD-425XCAMO) and 425 (SD-425CAMO) Ready for Anything: This camouflage dog collar features DryTek waterproofing, making it submersible up to 25 feet and perfect for marshes and wet training conditions Charge Fast, Train Longer: This quick-charge dog collar uses a 2-hour recharge lithium-ion battery with a low battery indicator collar, so you're never caught off guard in the field Built for the Field: SportDOG gear was designed by professionals who demand durable, no-nonsense tools that perform in real-world conditions without fail Trusted by Serious Trainers: Professionals rely on SportDOG for proven performance, consistent control, and expert-backed training guidance that gets results