OFF!
OFF! Clip-On Mosquito Repellent
Spatial Device · EPA-registered spatial repellent device
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Pros
- Genuinely useful as a personal bubble: clipped to your belt, the fan pushes metofluthrin around you and cuts bites 40 to 70% in still air.
- Pocket-sized and battery-powered, so it is the one emanator you can actually carry from chair to chair.
Cons
- It is a cloud, not a zone: lean out of the still air around you and most of the protection goes with it.
- The weakest and least reliable of the emanators, and the vapor is still toxic to fish.
The full review
Battery-powered personal emanator that clips to a belt or bag and runs a small fan over a metofluthrin cartridge, creating a repellent cloud in the air right around you rather than treating skin. It is genuinely hands-free and DEET-free, but the protective cloud is small and personal: it works only very close to the device and breaks down quickly in any breeze. Independent testing has found real-world protection well short of the label duration.
Scorecard
Expand any pillar to see exactly why it scored what it did.
Effectiveness45%36This is an area device, not applied to skin: published field trials report roughly 40–70% fewer mosquito landings or bites, over a small personal cloud rather than an area. Scored 60% on that reduction and 40% on how much space it protects, so a larger zone counts for real. Reduction figures come from controlled or semi-field trials, not backyard conditions. Real-world protection drops sharply in wind and open air, so this is scored with lower confidence.
This is an area device, not applied to skin: published field trials report roughly 40–70% fewer mosquito landings or bites, over a small personal cloud rather than an area. Scored 60% on that reduction and 40% on how much space it protects, so a larger zone counts for real. Reduction figures come from controlled or semi-field trials, not backyard conditions. Real-world protection drops sharply in wind and open air, so this is scored with lower confidence.
Evidence & honest claims25%67Metofluthrin is backed by definitive published evidence, weighted by how close its concentration is to the studied effective dose (base 72). Of 3 marketing claims audited: 1 strong, 0 moderate, 2 weak, 0 unsupported (-10). Product-specific research exists (+5).
Metofluthrin is backed by definitive published evidence, weighted by how close its concentration is to the studied effective dose (base 72). Of 3 marketing claims audited: 1 strong, 0 moderate, 2 weak, 0 unsupported (-10). Product-specific research exists (+5).
Safety15%60This is an area device, not applied to skin, so dermal risk does not apply. Scored on moderate inhalation risk from the vapor (−18); high toxicity to fish and aquatic life (−22). Use it outdoors in the open air only. Keep it well away from ponds, aquariums, and water features.
This is an area device, not applied to skin, so dermal risk does not apply. Scored on moderate inhalation risk from the vapor (−18); high toxicity to fish and aquatic life (−22). Use it outdoors in the open air only. Keep it well away from ponds, aquariums, and water features.
Transparency15%65This product names its active ingredient (+30); discloses the strength of every active (+35); does not publish a coverage figure (0).
This product names its active ingredient (+30); discloses the strength of every active (+35); does not publish a coverage figure (0).
Every pillar is scored from published rules. Read how we score.
Coverage & effectiveness
This is an area device: it protects a zone around it rather than your skin. Effectiveness is the published reduction in mosquito landings or bites. Real-world protection is best in still air and drops in wind or open space.
Mosquitoes
EstimatedModerate- Protected zone
- Personal zone
- Fewer bites
- 40–70%
A 2012 Journal of Medical Entomology study measured roughly 70 percent fewer mosquito landings very close to the device, but protection collapses beyond about 0.3 meters and in any breeze. Independent testing has also found real protection closer to about 2 hours despite the 12-hour label duration, so treat this as a small personal cloud, not zone coverage.
Ingredient disclosure
This product names its active ingredient (+30); discloses the strength of every active (+35); does not publish a coverage figure (0).
Only active ingredients are disclosed. The full ingredient list (inerts/carriers) is not published, so this may not be the complete formula.
- MetofluthrinActive
Active repellent · 31.2%
Claims audit
What the marketing says, versus what the evidence supports.
“Up to 12 hours of protection per refill”
DurationWeakIndependent testing measured roughly 2 hours of real protection versus the 12 hours on the label.
“Hands-free personal mosquito protection, no spray or lotion”
EfficacyWeakAbout 70 percent landing reduction only very close to the unit; the cloud collapses beyond roughly 0.3 meters and in any breeze.
“DEET-free”
Deet FreeStrongActive is metofluthrin (31.2%), not DEET.
Safe around dogs & cats?
Worst case from this product’s active ingredients. Do not apply this or any human repellent to your pet.
Mainly from Metofluthrin.
Not veterinary advice. Full guide to repellents around pets →
Related research
- Field Evaluation of the Off! Clip-On Mosquito Repellent (Metofluthrin) Against Aedes albopictus and Aedes taeniorhynchus in Northeastern Florida2012Well-supported evidence
Human-subject field trial of the OFF! Clip-On metofluthrin emanator at two Florida sites.