Lenovo 100 in-ear Headphone-BlackDIMENSIONSHeight x Width x Depth:200 mm x 45 mm x 85 mmWeight: 0.08 KgSYSTEM REQUIREMENTSWorks with Common calling applications across almost all platforms.Analog connection with 3.5mm audio in and audio out jacksSingle 3.5 mm jackTECHNICAL SPECIFICATIONSInput Impedance: 22 OhmsSensitivity (headphone): 122 dB +/-3 dBSensitivity (microphone): -44dBV/Pa +/- 2.5dBFrequency response (Headset): 20Hz to 20kHzFrequency response (Microphone): 100Hz to 6.5kHzCable length: 1.8mPACKAGE CONTENTSStereo headsetUser documentatio