QOLTEC 50844 Wireless Headphones 80051462 Product Description: Qoltec Soundmasters - headphones with mic Product Type: Headphones - Bluetooth - wireless, wired - 3.5 mm jack Recommended Use: Portable electronics, computer Colour: Black Headphones Form Factor: Full size Connectivity Technology: Wireless, wired Wireless Technology: Bluetooth Bluetooth Version: Bluetooth 5.0 Sound Output Mode: Stereo Audio Specifications: Frequency Response 20 - 22000 Hz - Sensitivity 115 dB +/- 3dB Impedance: 32 Ohm Controls: Volume control, answer/end, play/pause Manufacturer Warranty: 2-year warranty