HAVIT HV-H913BT Bluetooth 4.0 earbuds with CSR V4.0+A2DP, Stereo Headset Headphone with Charging Dock & Micro for iPhone, Android and enabled Bluetooth Devices (Black) [Enjoy Clear Conversations on Both Ends of the Call]: Adopting CSR V4.0 + A2DPthe audio quaility of the Havit HV-H913BT is guaranteed. (Please make sure there is no obstacles between the headset and your phone ) [Safe Conversations]: The headset automatically wakes, connects, and answers, letting you put your hand back on the wheel and safely enjoy your conversation; Up to 7-8 hours talk time. [Charge on the Go]: The dock is specially designed to mount to the air vent so that you can charge the Bluetooth headset when you are driving. The magnetic charging dock automatically triggers Sleep/Wake modes to make the most of the battery's 7-8 hour continuous play time. [Featuring Simple Pairing Technology], the headset automatically pairs with the closest Bluetooth-enabled device. Simply turn on the Bluetooth feature on your smartphone, then select the device and you're connected! [Compatible with All Phones That Are Bluetooth Enabled]: Apple, BlackBerry by RIM, Cal-Comp, Danger, HP, HP Palm, HTC, Huawei, Kyocera, LG, Motorola, Nokia, Pantech, PCD, Samsung, Sanyo, Sharp, Sony Ericsson, UTStarcom, ZTE