This electric vacuum suction cup car phone holder is made of ABS, PC, and alloy materials. It has a strong magnetic function and can be folded for easy storage. The holder is suitable for various phone models and can be used on glass screens, smooth walls, and mirrors. It comes with a traceless sticker for use on non-glossy surfaces and a magnetic attracting ring for phones with weak magnetic functions. The product has a built-in battery that needs to be fully charged for optimal use.