Behind-the-Neck Sporty Durable Bluetooth v3.0 Wireless Earphones Headset-Black Color: Black/Blue, Bluetooth v3.0 Wireless Technology Behind the Neck design, Portable, easy & sport design Stereo Bluetooth - Listen to music and make hands-free calls Supports iPhone, iPad, Samsung, and 99% of mobile phones and devices with Bluetooth function Mini USB charging port (cable included), Material: PVC & Silicone