Why it matters
Collar 4 uses dual-frequency GPS with four updates per second; Halo claims accuracy within two feet with Precision+ corrections. Battery lasts 30+ hours, it fits necks 8–30.5 in and is IP67. Feedback is sound, vibration and static. A plan from $9.99 a month is required. It is sold while supplies last. One-year warranty.
Who it's for, and who should skip it
Good fit if
- Halo on a budget
- Suburban yards
- Travel
Look elsewhere if
- Dogs that chase traffic or wildlife hard
- Fearful or reactive dogs
- Homes near busy roads without a physical fence
Pros and cons
Pros
- Dual-frequency GPS
- Wide neck fit
- GPS fences
Cons
- Plan required
- Short battery
- Previous generation
Limitations to weigh
- Invisible fences don't stop other animals or people coming in, and a determined dog may run through the boundary and then be blocked from returning.
- Containment systems need several weeks of flag training with rewards; welfare groups advise a qualified trainer and physical fencing where possible.
- Static corrections are aversive; use tone or vibration first and the lowest level that works.
- GPS boundaries drift near buildings and trees; no GPS fence is a physical barrier.
Specifications
Every figure below comes from the source shown in brackets. Where the maker doesn't state something, we say so instead of estimating.
| Price seen | $549 | Maker |
|---|---|---|
| Model number | 850035906521 | Maker |
| Sale price seen | $424 | Maker |
| GPS | Dual-frequency GPS | Maker |
| GPS accuracy (maker claim) | Within two feet with Precision+ corrections (maker claim) | Maker |
| Location updates | Four GPS updates per second | Maker |
| Battery life (maker-stated) | 30+ hours | Maker |
| Neck size range | 8 to 30.5 in | Maker |
| Water resistance (maker-stated) | IP67 (maker-stated) | Maker |
| Boundary feedback | Sound, vibration and static | Maker |
| Subscription | Required; plans from $9.99/mo | Maker |
| Warranty | 1 year | Maker |
Alternatives worth comparing
More dog fences & containment we cover
- SpotOn GPS Dog Fence (Omni Edition) $899 seen
- PetSafe Basic In-Ground Fence System $134.99 seen
- PetSafe Classic In-Ground Fence $174.99 seen
- PetSafe In-Ground Fence $204.99 seen
Final verdict
A capable older Halo.
Where to buy
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$549Manufacturer store price. Prices change; check the current price before you buy.
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Questions buyers ask
Does Halo Collar 4 need a plan?
Yes, from $9.99 a month.
How long is battery life?
30+ hours.