Slightly curved surface, offering smooth feel of touch and easy to hold. Textured rubberback cover to prevent slipping and scratching your devices. High Capacity Li-Polymer battery of 12000mAh. Compatible with various mobile devices, including smartphones and tablets. 2.1A output that enable faster charges. 4-level LED indicator to show the charging status. Plug and charge, with 10-second power saving mode. Protections: OCP, UVP, OVP and SCP. FCC/CE/BSMI approved and RoHs compliant. Product liability insurance by SP up to USD 10 Million.