Feature: 1. 40W solar panels, made of monocrystalline PV cells, with an efficiency of over 20%, which is more energy‑efficient and eco‑friendly. 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. Large‑screen LCD display, adjustable charge and discharge parameters, with power‑off 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 New Item Type: Solar Panel Material: ABS Power: 40W Working Voltage: 20-22V Open Circuit Voltage: 24V Working Current: Peak value is around 4.5-6A Short Circuit Current: 8.9A Solar 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