Solar Panel Foldable Portable Universal 12W High Efficiency Dual-Port Solar Charger - by iURJA High Conversion Efficiency: 12/18/24 watt SUNPOWER mono-crystalline solar panel increases conversion efficiency up to 25% which is much higher than common solar panel charger(15%). Dual USB Output: Provides enough power to charge two devices at a time. Ultra Portable: Triple fold design (153 x 263mm folded) and lightweight (480g) makes it very easy to pack into your backpack. Thoughtful Details: Well-placed eye-hole, mounting loops around the panel and 4 carabiner hooks allow easy attachment to backpacks, bicycle, tent, etc. Included in the box: iURJA Solar panel (12 Watts), USB Cable, User Manual.