A mobile phone arm bag is a convenient device for carrying a mobile phone that can be easily attached to the arm. Designed to fit snugly around your arm, they provide a secure storage space so you can take your phone with you while exercising, running or working out outdoors. Various styles: Various styles and rich colors to meet the personalized needs of different users. The product size is 4*7in,and the size can also be customized according to the customer's needs.
