To general large supermarket would give the front desk staff, equipped with a power supply, make them better at work convenient, at the same time use the power supply will also save a lot of time, while scan will appear below the total price of each commodity, also convenient front desk cashier work, with the power supply of commodity prices are accurate, special working, later once my colleagues and I go to the supermarket together, found in the supermarket also have new equipment, no scanning machine, you can be a simple operation, and is also particularly convenient to use and also don’t have to line up behind, but also reduce a lot of time and energy.