Wireless Headphones - headset, around the ears, closed construction, 3,5mm Jack, frequency range: 20 Hz-20000 Hz, sensitivity: 115 dB/mW, impedance: 24 Ohm, converter: 30mm, battery life of up to 18 hr(s) Enjoy listening to music without annoying cables. The Philips TAH6005BK wireless headphones excel in comfort. Their ear-covering design guarantees perfect insulation against ambient noise. With a frequency range of 20 to 20000 Hz, you can be sure that you won't miss a single note of your favourite song.   A fully charged battery will be able to last 18 hr(s). Philips TAH6005BK Wireless Headphones Key Features Material of these wireless headphones by Philips TAH6005BK: closed Beautiful black colour Connection method: 3,5 mm Jack Total weight of Philips wireless headphones: 207 g Single charge battery life is 18 hr(s)