1. High Conversion EffIciency:Made of polycrystalline silicon solar cells, the solar panels adopt multi-layered cell to convert the natural sunlight to useable electricity.With up to 20.5% of high conversion efficiency. 2. USB Smart Charging Technology:USB output: 5V 12V/ 3A (max), For Smartphones, tablets,GPS, digital cameras Charge. 3. Portable Solar Panels:Foldable design, 21W portable solar charger is suitable for camping, , climbing, rock climbing, any external activity. You can also hook it in the backpack through the attachment hook when walking. 4. Plug and play: plug and play, easy to use, even for inexperienced beginners, you can also quickly connect. 5. Purpose: It can be Fast charging to meet the needs of some low-power electronic products. Great for outdoor work, travel or camping. Name: 21W ETFE Solar Folding Charger Output voltage: 5V/12V Current: 3A (intelligent voltage stabilization) Output interface: dual USB/DC (with fast charging) : Grade A monocrystalline silicon Conversion rate: 20.5% Unfolding size: 585 x 260MM Folding size: 260 x 195 x 15MM Process: ETFE lamination integration (2nd generation lamination integration technology) Waterproof grade: IPX6 Features: ultra-thin, waterproof, high lightweight, fashionable, dust-proof and scratch resistant color:Black Material:ETFE Package Contents: 1 x 21w solar folding charging bag 2 x Mountaineering buckle Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.