Feature:1. 40W solar panels, made of monocrystalline PV cells, with an efficiency of over 20%, which is more energyefficient and ecofriendly.2. Comes with 4pcs suction cups, it can be attached to window or other places for indoor use. Large capacity, suitable for travel and other outdoor activities.3. A spare cable can be used to connect the charging control to the battery. Largescreen LCD display, adjustable charge and discharge parameters, with poweroff memory function.4. With a 12V/24V PWM solar controller, it can automatically recognize 12V/24V. Dual USB output, the maximum current is 2.5A.5. Made of high quality ABS material, rugged, anti-corrosion, durable to use. Light weight, easy to carry.Specification:Condition: 100% Brand NewItem Type: Solar PanelMaterial: ABSPower: 40WWorking Voltage: 20-22VOpen Circuit Voltage: 24VWorking Current: Peak value is around 4.5-6AShort Circuit Current: 8.9ASolar Panel Size: Approx. 54 x 43cm/21.3 x 16.9in.Package List:1 x Solar Panel1 x Solar Controller1 x 1m/3.3ft Extension Cable4 x Suction Cup1 x Solar Controller Manual