QOLTEC 50816 Qoltec In-ear Headphones Wi 80051462 Product Description: Qoltec - earphones with mic Product Type: Earphones - Bluetooth - wireless Recommended Use: Portable electronics, computer Style: Sports Colour: Black Headphones Form Factor: In-ear Connectivity Technology: Wireless Wireless Technology: Bluetooth Bluetooth Version: Bluetooth 4.2 EDR Sound Output Mode: Stereo Audio Specifications: Frequency Response 20 - 22000 Hz - Sensitivity 105 dB Impedance: 32 Ohm Microphone: On-cable Controls: Volume control, answer/end, play/pause, next/previous track Manufacturer Warranty: 2-year warranty