Keep your smartphone in the queue anytime, anywhere. These Dual Wireless Headphones with Powerbank are designed with smart technology. You'll enjoy APTX error-free sound with noise cancellation. They are also very convenient and easy to carry. Once you have charged up the charger it will hold its power for up to 20 days with the most stable Bluetooth signal! Whenever you are down to the last drop of energy in your phone, just plug it into this portable charger and your phone will come back to life like it just had a triple energy shot. The on/off switch allows you to control how much power you want to use and save some for the later.