The Emmer Eco-Friendly Power Bank is engineered using Wheat Straw. This is good and sustainable for the environment, but it also has practical advantages. Wheat straw doesn't get as hot as plastic, so it helps keep your phone cool to avoid damage. It's also extremely durable, the hue doesn't fade, and it's quite resistant to scuffs and scratches. With 4 LED battery indicators, you will always know how much power is left, and with 1 type C output/input, 1 Micro USB input and two 2.0A USB output