The Crazybaby Air (NANO) wireless in-ear headphones designed to deliver high fidelity, true wireless stereo sound. Designed for music lovers and audio aficionados exercising, traveling, or studying inside or outdoors. Their 5.5mm micro drivers utilize 998 carbon nanotube diaphragms and produce a broad frequency response of 8 Hz to 24 kHz. Connection stability is enhanced by the planar inverted-F antenna.