Bluetooth Headset Headphones Earphone, SAVFY Wireless Hands-Free Headset for Apple iPhone iPad iPod Samsung Android Smart Phones and Other Bluetooth Device (Black-Red Bezel) SAVFY Bluetooth 3.0 Headset, series delivers enhanced audio and bass response and a host of calling features in a sleek, comfortable design High-fidelity stereo audio earphones enjoy entertainment Ultra lightweight at 30 grams . Unique ring-necked design Long standby (10 days), long call (10 hours), Working time: Music state 6-7 Hours Compatible with standard Bluetooth-enabled smart phone, media devices