What could possibly be better than a pair of Grado headphones? A pair of Grado headphones without the cord! The Grado GW100x wireless headphones use non-other than Grado’s own signature drivers, which are finely tuned for the different enclosures used throughout their headphones and the GW100x are no different. The speaker housings have been specially designed to reduce escaping sound by up to 60%, increasing the amount of detail and losing none of that legendary Grado midrange in the worlds first open-air Bluetooth headphones. The design language used in Grado’s headphones continues here, looking like its part of the family at nothing more than a glance. GW100x headphones produce a sound that is pure Grado with warm harmonic color, rich full-bodied vocals, excellent dynamics, and an ultra-smooth top end. Handmade in Brooklyn, New York, USA. Transducer type: Dynamic, matched to 0.1 dB. Operating principle: Open air. Frequency response: 20-20,000 Hz. SPL: 99.8 dB/1 mW. Impedance: 32 ohms. Weight: 8 oz. Bluetooth version 5.2. Charge time: 2 hours.