Feature: 1.The Newest bluetooth headset with lightweight and compact portable design.Simple and Stylish. 2.Built-in HD and sensitivity microphone. Idea for in-car calling or working use. Support A2DP , makes you enjoy clear and natural sound when calling. 3.Built-in 50 Mah polymer battery. 4.Can connected with two smartphone at the same time.The wireless range up to 10 meters. 5.Compatible with most Bluetooth-enabled devices. This will connect automatically with a phone paired previously. Bluetooth Version:V4.0+EDR handsfree/headset Wireless Frequency:2.402-2.480GHz Transmission power:Class2 Talk time:about 4 hours Charger time: 2 hours Effective range: 10 meters Weight:about 42g Package Include: 1 x Earphone 1 x instructions 1 x USB charging cable