Vitality Bluetooth Wireless CSR 4.0+EDR Stereo Headset Earphone Headphone Neckband Style (HBS-740) (Black & Gold) Bluetooth 4.0 wireless technology Built-in microphone for answering phone calls Multipoint technology supports simultaneous connection to two devices Vibrating call alert Talk time: up to 15 hours; music time: up to 10 hours; standby time: up to 15 days