Viotek Vitality Wireless Bluetooth 4.0 in-Ear Headphones with Built in Microphone and Neckband Stereo Headset (Gold) Wearing style: Neckband Ear Bluetooth Version: CSR 4.0 Talk Time: Up to 15 hours; Music Time: Up to 10 hours Battery: 3.7/195mah lithium polymer battery (USB charger included)