• With USB output interface, it can charge your mobile phone 
• Support hand-cranked power generation, solar charging, USB charging
• Built-in 3000mAh polymer battery, with long use time
• Waterproof and pressure resistant, durable to use
• Retractable design, easy to store and carry

Specification: 

• Battery capacity: 3000mAh
• Total height: 26.9cm (with handle)