S109 Bluetooth headset comes with 10 minutes Fast Charging for 18H playing time and Large Capacity Battery : Unlike other wireless earbuds, wireless earbud only 10 mins can be charged for 18 Hours Play time. With newest technology and large capacity battery our bluetooth earbuds is design with fast charging (10mins charging)for 18 hours playing time. Hi-Fi Sound Quality: Bluetooth headset with Built-in HD Microphone and CVC6.0 noise cancellation. ensure Hi-Fi Stereo Sound Quality. Let other party get high quality and clear voice even in noisy environment such as (driving, street, Gym, shopping malls) Professional Business/ Sports Style: With stylish hook design, Bluetooth Headset bring you professional business/sports experience, you will never worry about the earbud will drop out of your ears with the hook. Comfortable and Adjustable: 360°adjustable earbud fits perfectly for your left or right ear, bringing you perfect wearing experience. You can adjust the angle of earbud to fit your ears better.Ultra light weight(only 15g) does not cause any burden to your ears, it’s comfortable for long time wearing. Wide range of application: It supports all the Bluetooth devices, such as laptops, tablets, Smart phones, including PC, Notebook,cellphones. Note: Please make sure your charger is 5V when charging this bluetooth earbud, if the charger is over 5V the earbud may be burned.