Main Features:- Especially suitable for emergency occasions when you work or travel in the wild or power-cut occurred- High anti-wear PET solar panels, durable to use- Also can be charged by using wall AC adapter and USB port of your computer- Protection for overcharge, overvoltage, overcurrent and short circuit- With water resistant, dust proof, shock and drop resistant functions- No built-in battery, don't worry about the security problems caused by heat and strong light Parameters:Solar panels peak power: 21WInput: 5V 2AOutput: 18V 1A ( max )Solar energy conversion rate: 22pct to 25pctOutput interface: USB Product weight: 0.612 kg Package weight: 0.612 kg Package Size(L x W x H): 32.50 x 19.10 x 4.00 cm / 12.8 x 7.52 x 1.57 inches Package Contents: 1 x Portable Solar Charger Pack, 1 x Micro USB Cable, 2 x Attached Hook, 1 x Car Charger, 1 x Transfer Cable, 10 x Detachable Plug, 1 x Alligator Clip, 1 x English - Chinese User Manual