Rebeltec Crystal Bluetooth headphones, black

Stereo headphones with microphone, designed for smartphones and tablets, high-class transducers guarantee crystal-clear sound. "Smart button" for answering and ending calls, playing and pausing music. Quick-folding headphones make travelling easier. 3,5mm mini 4-pin jack connector (in/out in one connector). Frequency response: 20Hz-20kHz. Impedance: 32 ? ±15%. Sensitivity: 105±3dB. Cable length: 1.6±0.15m. Special-profile cable that resists tangling. Speaker diameter: 40mm