Product Description Nokia BH-121 - headset Product Type Headset - Bluetooth - wireless - NFC Recommended Use Portable electronics Colour Black Headphones Form Factor In-ear Connectivity Technology Wireless Wireless Technology Bluetooth Bluetooth Version Bluetooth 3.0 Sound Output Mode Stereo Audio Specifications Frequency Response 20 - 20000 Hz Controls Volume, on/off Designed For Nokia X Dual SIM, XL Dual SIM; Lumia 1520, 2520, 830, 925, 930