Hign-concerned Chemical: none Certification: CE Max Input: 20W Shell Material: Metal Features: Charger & Battery in 1 Support Quick Charge Technology: Two-way Quick Charge Input Interface: USB Output Interface: Micro USB Battery Type: Li-polymer Battery Type: Portable Power Bank Note: The first picture is the main picture, and the other pictures are renderings. Due to manual measurement and light reasons, 1-3cm error and small color difference are allowed, please refer to the actual object.