The back cover is compatible with REDMI 9C phone model, which is made by Xiaomi brand. You can Design and Customize the Cover with your Pictures or Text. You can also use your Social Media Pictures on the personalized case. Just click on Add Image or Add Text to start designing your own unique case. The case is available in 2 materials – Hard & Soft. Hard Case is made up of Poly Carbonate material with matte finish. Soft Cases are made up of silicone TPU material. Hard Cases are printed on back and both the sides. Soft Cases are printed on back only.