Description: The unique solar phone charger uses fast charging technology that detects the device you want to charge and delivers the appropriate current to ensure powerful and stable charging. Portable and foldable for hiking, camping and any outdoor activity or just anytime you find yourself in a place without sufficient power. Features: [Compact and lightweight] The foldable solar charger is small and lightweight enough to fit in any camping backpack, hiking backpack or emergency kit. [Efficiency & Stable USB Port] Charging efficiency up to 5V/2.4A max, with a built-in voltage stabilizer, automatically adjusts the current and auto-restart function, no need to reconnect when moving to shade or cloudy days. [Conversion [High Energy Saving] Sunpower high efficiency monocrystalline silicon solar panel ensures high energy conversion rate above 20.5%. [Wide Compatibility] You can use this solar power charger for any device 5V electronics like batteries, cell phones, tablets, emergency lights, etc., compatible with most brands of phones on the market. [High durability] We only used the best and the strongest materials to ensure long-term durability. With reinforced holes, it's easy to hang where you need it, like on your backpack. Features: Power?: 15?W (Type?1)?; 30W (Type 2) (Optional) Color: Black Material: Monocrystalline Silicon Output Interface: Dual USB (15W), Dual USB/DC (with fast charging) Output voltage: 5?V (15?W), 5?V/12?V (30?W) Output current: 0-3?A (15?W), 3?A (30?W) Solar energy conversion rate:?20.5% Waterproof: IPX6 Occasion: outdoor, travel, camping Unfolding size: 55*17.5cm/21.65*6.88in (15W); 55*38.5cm/21.65*15.15in (30W) Folding size: 17.5*18*0.5cm/6.88*7.08*0.19in (15W); 19*18.5*1.5cm/7.48*7.28*0.59in (30W) Package size: 21.5*19.5*4.2cm/8.46*7.67*1.65in Package Weight: 450g/0.99lb (15W); 900?g/1.98?lb (30?W) Package List: 1 * Foldable Solar Charger with USB Port 1 * 2PCS CarabinerCharging Description: Power storage function is not supported, support charging the device only under sunlight. Different charging time and current depend on different light intensity, working with power bank to achieve better effect.