1, The USB port provides 5V regulated output, and the DC port provides 12V charging for energy storage devices.2, Connect DC5521 ports in parallel between multiple solar panels to increase output power.3, Product Use: Charge mobile phones, action cameras, power banks, GPS, and other electronic devices.Solar Cell: Monocrystalline siliconSolar Cell Conversion Efficiency: 22%Solar Panel Lamination Process: ETFEMax Power: 15WOutput Port: USBUSB Output: 5V / 2.5A(Max)Operating Temperature: -10~+50Best Operating Temperature: 25Folding Number: 3Folding Size: 215x205x23mmUnfolding Size: 575x205x23mmWeight: 0.465kgMaterial: Monocrystalline siliconcolour: blackPackage Contents:1 x Solar Panel Charger1 x 3in1 Charger Cable1 x 1M DC5521 Cable2 x BuckleOnly the above package content, other products are not included.Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.