Panasonic's classic earbuds are compatible with all devices using a standard 3.5mm headphone jack, including home hi-fi towers, media players, smartphones, CD / DVD, MD, MP3 / MP4 players and laptops. Sensitivity: 105 dB / 1 mW Impedance: 17 Ohm Maximum power consumption: 40 mW Range: 10Hz - 25kHz Cable length: 1.2 m ± 0.03 m Connector: 3.5 mm