a. 4.4W (2 x2.2W) multi-crystalline silicon solar panel b. 5pcs 1.2V/1600mAh Ni-MH rechargeable batteries c. Output: DC12V/DC6V d. 8-10 hours under sunlight for fully charging the built-in batteries e. Temperature range: -40F to 176F / -40C to 80C