Syllable Wireless Bluetooth Stereo Headphone G15 with Mic,Folding Design (White) Wired and Wireless Double Use Built-in Clear Mic for Phone Talking,Can listen to music, answer the phone, hang up the phone, make calls and more Bluetooth: 2.4GHz frequency, 15 to 40m working range Adopts 40mm high fidelity titanium membrane loudspeaker Multifunction keys: power on/off, previous/next song, volume +/-, indicator light