It's hard to explain how wonderful it is to completely cut the cord on your headphones. To not have to untangle them, or worry about them getting caught on your bag or jacket. To run without a sweat-covered cable bouncing everywhere. Cable-free headphones almost make you forget you're wearing headphones. It's as if music is coming from somewhere deep in the back-center of your head. I don't mean to wax romantic about ditching an AUX cable, but seriously: It's amazing.

The $299 Dashes are among the first pairs of commercially available "truly wireless earbuds," which means, well, just that. They have exactly zero cables. You place a teardrop-shaped pod into each ear, and they connect to your phone via Bluetooth. They connect to each other, through your head, using a technology called near-field magnetic induction (NFMI).

Bragi, the German company behind Dash, has big plans for the earbuds. There are 23 sensors inside each one, which can (or someday hopefully will) track your activity and your heart rate, respond to gestures and the environment, and much more. They're not just headphones, Bragi says. They're not even just a killer fitness companion. They're hearables. Or earables. (Whatever. Take your pick.) The company's long-term plan is to put a computer in your ears, Her-style, and start to figure out what happens then.

But these Dashes, the ones in my ears? They do a couple of things, like track your runs and make phone calls. Mostly they're just headphones. Good ones, even … at least, when they work.

Listen to This

I worried briefly about losing the Dashes, but that was never a problem. They're remarkably secure in your ears: I gave myself a headache shaking around, yet the Dashes stayed put. They're waterproof enough to take swimming or in the shower, and light enough that you can wear them most of the time. The only reason you ever have to take them out is to charge the battery, which you'll need to do every three hours or so. Luckily, the carrying case will also charge the buds a few times over, so you can at least get through a day without plugging into a wall.

Think about the Dash as a two-part organism. Right ear and left ear. Your right ear is all about music: You tap on the touch-sensitive surface on the right ear to play and pause music, swipe to change the volume, tap and swipe in various ways to change songs and switch between playlists. The left ear is for all the other things: Press and hold to start tracking your run, double tap to scroll through activity options, tap once to end the run.

If you do use the 'phones to track your activity, all the info shows up in the companion Bragi app for iOS and Android. You'll also find a manual there, and a handy way to get in touch with customer service. Everything about the device, even the box itself, is designed to help you figure out what to do with it and how. Good thing, too, because there's a lot to discover.

Nearly all of the Dash interface consists of taps, swipes, and audio feedback. As you scroll through menus, a slightly robotic female voice reads the options aloud. Different beeps and dings have different meanings. It takes some getting used to, but it's dynamic enough that you never really get lost, which is a serious achievement. There's no history for this kind of interface, and Bragi's done a lot of things right.

As soon you take the Dashes out of their hard carrying case and pop them in your ears, they ding brightly. The earbuds recognize the motion and turn on automatically. "I am now connected," says a voice in your right ear. At least, that's how it's supposed to go. Way too often, the Dashes wouldn't turn on when I took them out. Or they just wouldn't pair with my phone. When it works, it feels magical and futuristic. When it doesn't, digging through Bluetooth settings and power-cycling my headphones gets old fast.

There's a bone-conduction microphone built into the headphones, but it's useless. Don't even try to make phone calls with the Dashes. Otherwise, though, you can use them just like any other pair of headphones, wireless or otherwise. (You can also use them as a standalone music player, since there's four gigs of internal storage, but who wants an iPod anymore?) They don't quite sound $300-headphone good, but they do sound good: You get a nice wide soundstage, and a lot more low-end than you'd expect. The sound can be a teensy bit dim and muddy on bright pop songs, though, and you can't get the volume to blow your ears out no matter how hard you try. Still, once you play with the different ear-tips to get a perfectly snug fit, odds are these are better than whatever earbuds you're carrying around right now. Especially if they're Apple EarPods.

Oh, and by the way, even if you buy a set of Dash buds, you're still stuck with your EarPods for a while longer. You can't connect the Dashes, or any wireless headphones, to the seat-back setup on an airplane or an older stereo. Connecting to a device that isn't yours is a hassle. Some wireless headphones have a wired option as backup, and the Dashes at least ought to have a dongle just in case. And if there were a dongle, I'd use it all the time.

For all the high-tech stuff this ear-computer does, the Dashes are basically ruined by Bluetooth. It's not just that they completely fail to connect sometimes, either. It's that even when they are connected, they're constantly dropping in and out. You get a few seconds of song, a beat of static, and back to the song. Or maybe you're stu-stu-stuttering your way through every song. Rinse and repeat until you're driven completely insane.

Bragi's always been straightforward in saying the Dashes are still a work in progress. Most of the work left is software, they say, which they'll keep tuning forever to turn on new features and improve the experience. That's great, but until they get Bluetooth right it's hard to recommend the product.

Josh Valcarcel/WIRED

Are You Listening to Me?

Whenever I wear earbuds, I constantly take one out and pop it back in. Maybe I'm listening to an announcement on the train; maybe I ran into someone I know. Unless I'm sitting at my desk, in the dark, working, headphones are rarely a set-it-and-forget-it gadget.

I never noticed any of that, by the way, until I started using Dash. Dropping an EarPod to dangle at my waist is fine, but with these I have to take out an earbud that's not attached to anything. Hopefully it turns off when I take it out, but just as likely it's now sitting in my hand switching tracks every time my palm brushes its touchpad. I either have to hold it, or put it in my pocket and mix earwax and lint together before shoving it all back into my ear. I'm still wearing one, which now makes me look like an asshole with a Bluetooth headset.

There are all these social norms that we take for granted with headphones that don't quite work with Dash. They have a cool audio passthrough feature, where you swipe forward on the left earbud and you'll start to hear ambient noise piped through the headphones in addition to whatever you're listening to—ostensibly so you don't have to take your buds out when you need to hear someone talking to you, or the truck barreling down behind you. But is that good enough? Or is it still rude to walk into the coffee shop wearing two headphones, even though I can hear just fine? The pop-an-earbud-out move is a universal symbol of sorts—I'm listening to you now!—but there's no equivalent here, and it makes wearing the Dashes constantly awkward. Google Glass had a similar problem, but at least you could see when someone was looking up and to the right at that tiny screen. With Dash, all you get is the dumb, glassy stare of someone listening intently to something you can't hear.

Truly wireless earbuds are going to happen, and thank goodness for that. But if earables/hearables/earputers/whatever you want to call them are going to succeed, we're going to have to sort these questions out both technologically and socially. I can tell when you're looking at your smartphone, because... you're looking at your smartphone. If you have headphones in, I assume you're not paying attention to me. What happens when you smash those two things together to make an ambient, occasional device you wear constantly in your ears?

These Dashes are a tantalizing glimpse at a device from that future, proof that it's possible to put all the sensors and chips in front of our eyes into our ears. This kind of gadget could someday be amazing, but Bragi hasn't made good on its promise yet, and it needs to. And before even that: It needs to make sure the computer in your ears stays connected to the one in your pocket. Nothing else matters until it makes great headphones. After that, who knows?