Fact 1: At the working level, the sensation is like a TENS unit
The internet calls them shock collars. At the working level on ULTRA K9 (typically 8-25 on a 124-level system), the sensation is comparable to a TENS unit used by physical therapists, not anything aversive. INVIROX trainers test every collar on their own forearm before fitting it to a dog. The misconception that shock collars deliver harsh jolts comes from old hardware that had only high-stim output.
Fact 2: Vibration mode is often more effective than stim
Many dogs respond more clearly to vibration than to stim, especially in early training. ULTRA K9 offers stim, vibration, and tone as 3 separate communication channels. Most INVIROX owners use vibration as a marker and stim only when needed for distance work or high-distraction environments.
Fact 3: Modern e-collars have 124 communication levels
Old shock collars often had 5 to 10 levels, which forced a choice between 'too low' and 'too much.' ULTRA K9 offers 124 levels with +/- buttons for real-time micro-adjustment. The high level count is what makes precision training possible. Without resolution, you cannot find the working level.
Fact 4: Most adult dogs train at levels 8 to 25, not maximum
The working level is the lowest setting where your dog shows a subtle response, like an ear flick. For most adult dogs, that is between 8 and 25 on a 124-level system. Higher than the working level creates stress instead of communication. Smaller dogs typically work at 5 to 15. Large dogs with thick coats sometimes need 18 to 30.
Fact 5: The e-collar is a clarifier, not a teacher
The most counterintuitive fact: the e-collar cannot teach a new behavior. It clarifies cues your dog already knows on a long line. If your dog does not reliably come when called in your backyard, the e-collar will not fix that. It will only add confusion. Build the cue on a long line first, then layer the e-collar at the working level on top.
ULTRA K9: built around all 5 of these facts
124 levels, 3 modes, +/- buttons, 1,100yd range. Trusted by 300,000+ dog owners.
See ULTRA K9Frequently asked questions
How do shock collars actually work?
A shock collar receives a radio signal from your remote and delivers one of three outputs through 2 contact points: low-level stim, vibration, or tone. On ULTRA K9, you have 124 levels of control. At the working level, the sensation is comparable to a TENS unit on a human muscle, not aversive.
What is a vibration collar for dogs?
A vibration collar uses the vibration motor in the receiver to deliver a tactile signal instead of stim. Many modern e-collars like ULTRA K9 include vibration as one of 3 modes alongside stim and tone. Vibration is often the preferred mode for early training and for sensitive dogs.
Are shock collars actually shocking?
Only at the higher levels. At the working level (8-25 on a 124-level system), the sensation is comparable to a TENS unit. The name 'shock collar' comes from older hardware that had only high-stim output. Modern e-collars offer fine-grained levels and multiple modes, which changes the experience completely.
How many levels should a good shock collar have?
At least 30. Anything less forces you to choose between levels that are too low to register or too high to be communication. ULTRA K9 has 124 levels, which gives you the resolution to find each dog's exact working level and micro-adjust during sessions.
Can a shock collar replace training?
No. The e-collar is a clarifier, not a teacher. Build your dog's cues (sit, place, recall) on a long line to 9 out of 10 reliability first. Then layer the e-collar at the working level on top of the known cues. Trying to teach with the e-collar alone creates confusion and fear of the tool.
