INVIROX Ultra K9 Double Receiver Shock Collar - 124 Levels, 34 Mile

In this review of the INVIROX Ultra K9 Double Receiver shock collar, the bottom line is clear: it is best suited for owners who need a rugged, long-range trainer for medium to very large dogs. The package delivers two synchronized receivers, an ergonomic remote and a broad set of adjustments so a single unit will cover basic cues to precise corrections. The biggest reason to buy is the combination of a very long 34 mile range and fine-grained intensity control, which together let handlers work at distance while tailoring stimulation to each dog's response.

Key Features

• 124 training levels: Extremely fine intensity gradations let trainers dial stimulation to the smallest effective level for clear communication without overcorrection.
• Four operation modes: Beep, vibration, shock and night-light give multiple, noninvasive ways to get attention or guide behavior depending on context.
• Double receiver included: Two collars in the kit allow simultaneous training of two dogs or a spare receiver for rotating dogs without buying a second system.
• Long battery life: The system can operate for many days between charges, with customer reports of extended multiweek use on a single charge in light-duty scenarios.
• Waterproof construction: IP67-rated receivers and IP65-rated remote enable training in rain, wet fields and other adverse conditions without worry.
• Ergonomic remote: The handheld controller includes a keypad lock and options to wear with a belt clip or lanyard for hands-free carrying.

Who It's For

The Ultra K9 system is aimed at owners and handlers of medium to large dogs, including working breeds, who need long-distance control and precise adjustment. It is especially useful for search, fieldwork, off-leash recall training, and owners who train multiple dogs thanks to the double receiver kit.

Owners of very small dogs under about 8 lbs or those seeking a purely positive-reward clicker system may want a less intensive training tool. Also, handlers who prefer purely vibration or sound-only aids without any shock option should consider vibration-focused trainers instead.

Pros & Cons

Pros

• Extremely broad intensity range provides precise stimulation for a wide variety of dogs.
• Double receiver adds flexibility for multi-dog households or backup use.
• Long reported battery life and durable waterproof ratings make it reliable for extended outdoor use.

Cons

• Some users report mixed impressions of shock strength and durability, so careful initial testing and monitoring are needed.
• The many settings and modes add a learning curve for first-time e-collar users.

Specifications

Our Verdict

The INVIROX Ultra K9 double receiver kit is a solid choice for owners who need long-range, configurable training and durability for outdoor use. Its combination of very fine intensity control, two collars and waterproofing offers strong value for handlers of medium to large dogs who will use the system responsibly and invest time to learn the settings.

Frequently Asked Questions

Is this collar suitable for large breeds?
Yes, the Ultra K9 is designed for dogs from about 8 lbs up to 150 lbs and works well on large breeds when properly introduced.

Can both receivers be used at the same time?
Yes, the remote controls both included receivers so you can train two dogs or keep a spare collar paired.

Is it safe to use in wet conditions?
The receivers have an IP67 rating and the remote is IP65, so the set is intended for use in rain and wet environments.