Grado's first wireless headsets are now available for $ 249.

There is no wired audio, but the high-end headphone manufacturers are doing their best to make the most of Bluetooth. As the latest example, Grado is now offering its GW100 headphones for $ 249. These are Grado's first wireless headsets. As for the rest of the range, these are open-backed helmets. You will not want to use them for your trips in the subway or in a noisy environment.

Grado says these are the first open-back Bluetooth headsets on the market. It's a mix that does not seem ideal for all listening situations, but the open-back design allows for a broad sound stage and more detail, depending on the company. "Some might think that wireless and open file are a strange pair, but you can now enjoy audio-free quality sound without attachments," reads the company's website. "Whether you're fly fishing or cleaning gutters, you do not want wires to hang. But you want a great Grado sound.

Grado says that these headphones were built from the ground to reduce background bleeding by 60%. So outside noise will come in, but I hope your pieces will not be as obvious or boring to your surroundings.

Inside the GW100, there is none other than our Grado drivers. These speakers are the same as those we designed for our wired headsets, which are precisely tuned for the different housings we use. The first Grado Labs wireless headset is no different, with specially configured drivers for them. The desired sound capabilities of the GW100 would not be possible without decades of experience in the design of drivers.

The GW100s have Bluetooth 4.2 and, for codecs, they support apt-X and AAC but not apt-X HD or LDAC. The battery life is estimated at 15 hours. There is a power button, a volume rocker, a 3.5mm jack if you want to connect, and a Micro USB port for charging. You can also buy a support or a case for the helmet.

Here are the rest of Nitty Gritty's audio specifications directly from Grado:

Bluetooth version: 4.2 with apt-X
Battery capacity: 320mAH
Working distance: 10m
Battery life: 15 hours **
Frequency response: 20Hz ~ 20KHz
Sensitivity of the microphone: 42dB +/- 3dB
Transducer Type: Dynamic
Operating principle: Open Air
SPL 1mW: 99.8 dB
Rated impedance: 32 ohms
DB adapted to the driver: .05 dB