Enlarge Image Grado

Grado is legendary among audiophiles -- partly because it makes truly excellent open-air headphones with a delightfully retro design, and partly because it's been building them by hand in Brooklyn, NY for over 60 years.

Now, for the first time, Grado will offer a wireless headset -- and we've just discovered that the company has quietly revealed exactly what that headset will be.

Enlarge Image Grado

You're looking at the Grado GW100, a Bluetooth 4.2 aptX headset with the same trademark Grado styling, Grado audio drivers, and open-air design as ever.

"We took our time and made no compromises in the GW100. Nothing is lost except the wires," writes Grado at its website.

Grado also claims they're the only open-back Bluetooth headphones on the market, though there's one likely reason for that: Bluetooth headphones are often a private way to listen to music and calls in public, whereas open-ear headsets like Grado's... let's just say they tend to leak sound.

Grado

The company claims the GW100 will last 15 hours on a charge at 50 percent volume, and it also comes with a 3.5mm audio jack and cable if you'd rather plug in a physical wire. Plus, there's a microphone on the GW100 so you can use it as a Bluetooth headset.

According to a user manual which CNET spotted in a brand-new FCC filing, you'll be able to use the power button to accept or reject calls, or double-tap it to summon your phone's voice assistant, too -- another use for that microphone. You'll charge the headphones with a micro-USB cable.

Enlarge Image FCC

Jonathan Grado tells CNET the GW100 will retail for $249 (roughly £200 or AU$330) and the plan is to launch in mid-September, with preorders a week or two before - - you can already see that price at Grado's official online retail partner 4ourears.net. Grado said the company's new website only went live this Friday, and was surprised to hear we found it so fast!

Here's the full spec sheet, straight from Grado's site:

Bluetooth Version: 4.2 with apt-X

Battery Capacity: 320mAH

Working Distance: 10m

Battery Life: 15 hours* ("based on 50 percent volume throughout playtime" says Grado)

Frequency Response: 20Hz~20KHz

Mic Sensitivity: 42dB +/- 3dB

Transducer Type: Dynamic

Operating Principle: Open Air

SPL 1mW: 99.8 dB

Nominal Impedance: 32 ohms

Driver Matched dB: .05 dB

Included: Headphones, Warranty, Grado story-sheet, micro-USB charging cable, 3.5mm audio cable

Update, Aug. 25 at 3:07 pm PT: With Grado comment, release date window.