- Page 1:Best Wireless Key Finder
- Page 2:How We Test and Rate Key Finders
- Page 3:Tile Mate: Best Key Finder
- Page 4:TrackR Bravo: Best Replaceable Battery
- Page 5:Chipolo Plus: Loudest Key Finder
- Page 6:Duet by Protag
- Page 7:Pally Smart Finder
- Page 8:Pebblebee Honey
- Page 9:Voilà by Wistiki
- Page 10:XY3
- Page 11:Pixie Point
- Page 12:Elgato Smart Key
- Page 13:Zomm Wireless Leash
- Page 14:Kensington Proximo Fob
- Page 15:LassoTag iBeacon
Duet by Protag
Editors' Note:The Duet app is no longer available from either Google Play or Apple's App Store as of this writing. While the Duet by Protag device remains on sale at various ecommerce sites, the tracker won't work if you can't download an app for it. Unless the app returns to either platform, we'd recommend avoiding this product, especially given the number of regularly updated alternatives you can choose instead.
When we first started testing key finders two years ago, Duet by Protag offered the best mix of features and performance in a wafer-thin 1.1 x 1.1 x 0.2-inch case. Alas, the Duet has stood still while other key finders — specifically the Tile Mate and TrackR Bravo, but also the Chipolo Plus — have made tweaks and improvements. We had some success using the Duet in the past, but it's hard to ignore the advances rival products have made since our initial review.
How Duet Works
Duet's app is available for both Android and iOS. In the app there are a couple different alert options. The most effective is the Buzz feature, which causes the Duet to emit an audible, if not exactly piercing, beep for 15 seconds. A second feature, Radar, uses bars and buzzing to indicate how close a lost Duet is to your mobile device.
A geofencing feature can send alerts to your phone whenever you stroll out of range. A Wi-Fi Zone feature keeps those alerts from sounding when both your Duet and your phone are connected to the same Wi-Fi network. Sadly, there doesn't seem to be a way to disable those alerts when your Duet is in a secured location — say, inside a backpack that you have in the trunk of your locked car as you walk away to run errands — other than dismissing the alerts your phone sends to you once you walk out of range.
You can also see a map of where your Duet was last recorded. If someone else with a Duet walks by, that person's app will ping the map to alert you of its location. We like the idea of the crowd-sourced locator feature, but it does require lots of other people to also own a Duet.
Duet doesn't just let you track your valuables; it also makes sure your phone isn't out of reach. Press a button on the Duet device, and your phone will start buzzing and beeping — assuming it's in range.
How Duet Performs
When we tested the Duet, it offered the most consistent performance of any proximity sensor. Other sensors have caught up in reliability, though the Duet's range of 70 to 80 feet remains among the best we've seen. We had less success hearing the alarm, which was fairly faint, even indoors. When I lost contact with the Duet, I usually had to walk 20 feet toward the device to re-establish contact.
Credit: Jeremy Lips / Tom's GuideWhen we tested the volume using our decibel meter, we couldn't register even 50 dB at 5 feet away. That's on a par with the category average. At 1 inch, however, we recorded 79 dB, which is louder than the company's own claims.
Battery life for the Duet is about six months, but Protag includes one replaceable CR2016 battery, so you can expect to get a year's worth of battery life out of the device before you pay up for new batteries. While it is the second-softest alarm we tested, when you consider the two-way tracking feature and consistent range, this is the most reliable choice if you're looking for a wireless key finder.
It's worth noting that our experience with the Duet doesn't match that of some Amazon customers, who've criticized the device's reliability. With other trackers catching up to and even surpassing the Duet, you've got plenty of other devices with better reputations to consider. We hope to one day see if the Duet can come up with an update that helps it regain its place near the top of the key finder pile.
Range: 70 to 80 feet on average; Longest distance 81 feet
Battery Type: Replaceable CR2016 battery
Loudness claimed (dB): 75
Compatibility: Android, iOS
- Best Wireless Key Finder
- How We Test and Rate Key Finders
- Tile Mate: Best Key Finder
- TrackR Bravo: Best Replaceable Battery
- Chipolo Plus: Loudest Key Finder
- Duet by Protag
- Pally Smart Finder
- Pebblebee Honey
- Voilà by Wistiki
- Pixie Point
- Elgato Smart Key
- Zomm Wireless Leash
- Kensington Proximo Fob
- LassoTag iBeacon