1. USB voltage regulator, can charge mobile phones, mobile power, GPS, lights and other electronic devices. The problem of outdoor power shortage. 2. lighter: car battery charger, car battery is insufficient and unable to start problem. 3. Suitable for outdoor, camping, hiking, climbing, traveling, fishing, desert island survival 4. Waterproof design, IP65 grade, light and portable, easy to carry. 5. Widely used in solar backpacks ,automobiles , ships , aircraft , buildings , etc Power generation: 100W Maximum power (pmax): 25W Open circuit voltage (voc): 20V Maximum power voltage (vmpp): 18v Short-circuit current (): 1.5A Maximum power current (impp): 1.25A Output: 18V Standard test conditions AM=1.5 Irradiance=1000W/ Temperature = 25Celsius colour:As shown Material:Monocrystalline silicon size:540 x 280 x 2.5mm Package Contents: 1 x 40A Solar controller 1 x Solar panel 1 x Chinese and English manual Only above package content, other products are not included. Note: Light and different displays may cause color of item in picture a little different from real thing. The measurement allowed error is +/- 1-3cm.