Philips SHE2900. Headphone frequency: 12 - 22.000 Hz, Headphone sensitivity: 103 dB, Magnet type: Neodymium. Packaging type: Blister. Gross weight inner carton: 0.2 kg, Net weight inner carton: 0.0855 kg, Quantity inner carton: 3 pcs. Gross weight outer carton: 1.902 kg, Net weight outer carton: 0.684 kg, Quantity outer carton: 24 pcs