Beartwo solar charger has dual USB charging ports that allow you to charge two devices simultaneously. One of the most lightweight chargers on the market weighs only 1.74oz. Perfect for jogging hiking and traveling. Waterproof, dust-resistant, and shock-proof. 10000Mah high-capacity. Enough for your iPhone 8 4-5 times. The solar charger is made of high-quality silicone rubber and ABS + PC material. Every USB port or micro-USB port is covered by a rubber cap, better protect the battery from water. Super compact design, you can easily take it out for hiking just like your cellphone.