The first and only open-back Bluetooth headphone on the market. No compromises… it's a Grado®. The GW100 v2 is the first Grado wireless headphone, featuring Bluetooth® technology. More than 25 years of experience designing the world's finest headphones naturally lead Grado Labs to developing the only open-back, Bluetooth headphone on the market. Some might think wireless and open-back are an odd pairing, but now you can enjoy audiophile quality sound untethered. Whether you're fly-fishing or just cleaning the gutters, you don't want wires dangling. But you do want awesome Grado sound. Grado's legendary driver technology, Bluetooth, padded headband, 40 hour battery life, and a lightweight comfortable design make them perfect for today's portable lifestyle. The large soundstage and detail only available from an open-back design, plus Bluetooth, coalesces into the perfect wireless headphone.

Specifications:

• Bluetooth Version:  5.0 with apt-X
• Battery Capacity:  850mAH
• Working Distance:  10m
• Battery Life:  Up to 40 hours
• 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