T9 Hair Cutting Machine and Electric Trimmer come with a powerful pure copper motor that delivers stable and robust performance. It is built-in large battery provides a long working time. It works with USB rechargeables and electricity. It has an LED indicator light that shows the charging status. The Green light is on when using, the red light is on when charging, and a red light turns to green when fully charged. This hair-cutting machine is suitable for barbers, and men.