Philips SHN2500 Noise Canceling Headphone. Ear coupling: intraaural, Headphone frequency: 40 - 20000 Hz, Headphone sensitivity: 102 dB. Connectivity technology: Wired, Cable length: 1.2 m. Dimensions (WxDxH): 37 x 125 x 232 mm, Weight: 131 g. Battery type: Yes, 1.5V Battery R03/AAA. Airplane plug: Yes, 2 * 3.5 mm