One of the most luxurious hands-frees on the international market, the original Handsfree with Remote Note lets you listen to music and make phone calls. The headset's elegant Luxury FlexGrip connection prevents cable damage. It is the ideal headset for a noise-free experience, offering maximum comfort and outstanding performance. It is also excellent for interactive games. It is compatible with the iPhone and all 3.5 mm audio jack devices. Frequency range: 13 mm Sensitivity: 18-20 KHz Impedance: 116dB at 1KHz, 0.5Vrms Length of cable: 32 ohms Jack: 120 cm Built-in 3.5 mm microphone.