Dear friends, our solar panel product link has various specifications, we have specifications without controller and specifications with controller,Please check whether the specifications of the products you buy are correct before placing an order. If you don't understand, please contact us, thank you. Features: 1. Constructed with high-quality materials, environmentally friendly, slightly waterproof, durable and sensitive. 2. Low noise, high efficiency and low failure rate. 3. Lightweight and portable, easy to carry. 4. As long as there is sunlight, high conversion rate can be continuous power supply. 5. Suitable for outdoor activities, emergencies and outdoor work. 6.Double USB female port, easily charge device via USB charging cable,Can used to charge mobile phone, MP3, pad, or other USB-charged device. Specification: Name:Solar Panel Solar Controller: PWM Size:420*280*30mm/16.5*11*1.2In Solar Panel Voltage: DC 12-18V Wattage: 100W Usb Port Quantity: Double Usb Plug Material: Monocrystalline Silicon Cell Suitable For: Cycling, Climbing, Hiking, Camping, Traveling, Outdoor Work Etc. Package Includes: 1 x 100W Solar Panel(Without Solar Controller ) 1 x Alligator Clip 1 x Car Charger OR 1 x 30A Solar Controller 1 x 100W Solar Panel 1 x Alligator Clip 1 x Car Charger OR 1 x 60A Solar Controller 1 x 100W Solar Panel 1 x Alligator Clip 1 x Car Charger OR 1 x 100A Solar Controller 1 x 100W Solar Panel 1 x Alligator Clip 1 x Car Charger Notes: 1.Manual measuring, please allow 1 ~ 3 cm error,thank you. 2.Before purchasing this item, you must make sure that you which one you choose. 3.Due to the difference between different monitors, the picture may not reflect the actual color of the item. We guarantee the style is the same as shown in the pictures.Please understand, thank you