How can you obtain efficient power supply when you are outside? A solar energy power bank must be a good solution. Designed for cellphone， MP3， MP4， console， tablet PC， camera， audio recorder， navigator and other digital products， our 4W-A Waterproof Pure Solar Energy Power Bank with Built-in Voltage Stabilizer for Outdoor Use allows you to enjoy uninterrupted and smooth entertainment anytime. It is rechargeable from absorbing sunlight and the waterproof material offers good daily water resistance so that you can feel assured to use it in the open air. Buy one and enjoy the blessing from the generous sun!                                    Features             Adopt highly efficient PET laminated solar energy panel and single-crystal material， great for outdoor use<br> Offer you good daily water/wear/heat resistance and great flexibility<br> Rechargeable from absorbing sunlight<br> Perfect power supply for business trip， travel， field work and so on<br> Fit for cellphone， MP3， MP4， PDA， console， tablet PC， camera， audio recorder， navigator and other digital products<br> Compact and portable design， convenient to carry<br> With built-in voltage stabilizer which makes it a good choice to charge your device <br>                                                            Specifications             Quantity     1    <br> Material     Silicone & PET    <br> Colour     Black    <br> Power     4W    <br> Conversion Efficiency     ＞17%    <br> Output Interface     USB    <br> Output Voltage     5V    <br> Output Current     0.8A    <br> Dimensions     (7.87 x 7.48 x 0.71)" / (20 x 19 x 1.8)cm (L x W x H)    <br> Weight     6.88oz / 195g       <br>                                                             Package Includes            1 x Solar Charger<br>