4000mAh advertising solar power bank suitable for outdoors sport charge for smart phones

Features:

1.Patent No.:2014 3 0334875.6, Brief&ergonomic shape. 

 2. Good for advertising .With a quality screen on the back,the pictures can be customized. 

 3. With SOS light and high light blinking for security. 

 4.Good for branded company as a present .