Bluetooth 4.1 Sport Stereo Headset Headphone Noise-Canceling Sport Wireless Earphone Headset Stereo Neckband Style Handsfree Headphones Black+Grey Color: Black/Gray Speaker Type: Stereo Sport Bluetooth Headset Wireless Technology: Bluetooth Bluetooth Version: CSR BC8635 V4.1 Remote: 10M Playback Time (up to): Talking Time: 6 hours, Stand-by time: 120 hours Package Contents: Stereo Sport Bluetooth Headset x 1, USB charging cable x 1, Manual x 1