QOLTEC 50825 Qoltec Headphones wireless 80051462 Product Description: Qoltec - headphones with mic Product Type: Headphones - wireless Recommended Use: Portable electronics, computer Colour: Grey, black Headphones Form Factor: Full size Connectivity Technology: Wireless Bluetooth Version: Bluetooth 4.2 EDR Sound Output Mode: Stereo Sound Effects: Super Bass Audio Specifications: Frequency Response 20 - 22000 Hz - Sensitivity 105 dB Impedance: 32 Ohm Controls: Volume control, answer/end, play/pause, next/previous track Manufacturer Warranty: 2-year warranty