Features:- Built-in high quality environment-friendly Li-ion rechargeable batteries with large capacity and high conversion rate of 88% on average.- Long lifespan with about 300 times of charging and discharinge.- With the solar panels on the upper side, it can absorb solar power into electricity.- With LED light for emergency use, just gently double-click the power button to turn it on.- With dual USB output interface which charge 2 mobile phone in the same time, and the charging port is  water-proof and dust-proof.- With a carabiner so it`s portable in the outdoor activities, and it`s rechargeable at any time when there is sunlight.- Wide applicability, very easy to use as a normal power bank, it can be applied to most of the  electronic equipment like smartphone, PDA, digital camera, MP3, MP4, PSP game consoles, so its a nice stand-by power source when in long-distance travel. How to Charge:- Solar charing, place it under the sun and it will be charged.- Connect it with the USB cable to a 5V USB charging port on a adapter, computer or the others. - The indicate light will be on when it`s full-charged. Precautions:- When you use it for the first time, please get it fully charged to get the best lifespan of the batteries.- When the battery indicator turns off when charging other devices, it means you should charge the power bank need timely charging.- When in use, please turn on the electronic device screen an make sure the charging connection flag displaying correctly which ensure a normal work. Specifications:- Product name: Solar Power- Material: Plastic- Color: Black, orange, green, yellow- Size: Approx. 16x7.5x1.5cm/6.29"x2.95"x0.59"- Batteries Type: Lithium-ion polymer batteries- USB Input: 5V- USB Output: USB1: DC 5V 1A, USB2:  DC 5V 2A- Power Capacity: 300000mAh Package Included:1x Solar Power1x Carabiner1x USB Cable1x User manual1x Box