When selecting touch scree pos system, buyers should focus on main boaed external lines, external interface capabilities, CPU clock speed, power consumption, the whole power consumption and thermal design.

1. Main board external lines: now there are a variety of cash register boards, external lines bandwidth are 33MHZ, 66MHZ, 100MHZ, 133MHZ, etc. The higher the external line bandwidth, the faster the cash registers run.

2. External interface capabilities: cash registers main boards have four or more serial ports, a parallel port or two, cash drawer port, Ethernet port, keyboard port, mouse port, USB port and so on. As the demand for commercial enterprises change frequently, often we need to extend POS capabilities, and therefore to select the pos machine with more external interface.

3. Frequency and power of the CPU: CPU clock speed determines the entire POS cash register machine speed, so to run the software platform in accordance with the requirements. Taking into account the CPU power, common CPU power is more than 30 watts, and low-power CPU consumes less than 10 watts. CPU is an important source of the cash register, if the temperature is too high, poor heat dissipation, may cause cash registers crash. Therefore you should choose low-power CPU.

4. Power consumption and heat dissipation design: POS cash register usage environment is poor, poor ventilation, so taking the thermal design of the machine into account.