An ultra-lightweight and compact design that weighs about 6.6g, it is a canal type Bluetooth earphone microphone that fits your ears. With Bluetooth wireless technology, you can enjoy conversation even if the mobile phone and this product are separated from each other within about 10 m. You can use it with most models of Bluetooth compatible mobile phones. Uses a lithium polymer battery to charge the main unit without replacing the battery. It can be used for up to about 3.5 hours for continuous calls and up to about 110 hours for continuous standby. In addition, it can be charged about 500 times repeatedly. With an incoming call switch, you can receive and make calls without operating your mobile phone.