Building on our beloved TIR-C Technology,29W foldable dual-port solar panel provides clean,renewable and economical electricity supply for your car battery.You can also take it with you while traveling to charge your electronic devices such as your cell phone, laptops and camera. In accompanied with solar generator, household electrical appliances. Product Specifications Input power (Solar Cell) : 29W±10% Input voltage: 13.2V Input current: 2.2A Dual-USB Output Power: 17.2 W (Max) Dual-USB Output Current: 3.6A USB Output Voltage: 5.0 V±0.25V USB Output Current: 2.1 A(Max) DC Input voltage: 12V DC Input current: 2.3A DC Output Power: 27.6W (Max) Solar Cell Efficiency: 22% Fabric material: polyester Folded Size: 29*16*5 cm / 11.5*6.3*2 in Unfolded Size: 68*28*2.5 cm / 26.8*11*1 in Weight: 728g / 25.7oz Package Contents 1 x 29W Foldable Dual-Port Solar Panel 2 x Stainless Steel Hooks 1 x User Manual 1 x USB Cable For Android 1 x DC Cable Note:The battery is not included and No function of Power storage.