Display screen: 21.5-inch liquid crystal display Discredence rate: 10808*1920 Touch screen: 21.5-inch touch screen Display mode: vertical screen display Signal transmission: wireless/wired transmission, built-in industrial 433MHz wireless module Processor: Intel I5 processor Internal memory: 4G memory Hard disk: 128G high-speed solid-state drive Host power supply: Great Wall brand power supply Sound: built-in amplifier and speaker Printing machine: 832 high-speed thermal printer Paper size: 80mm ± 0.5 mm x dia. 254 mm max Printer size: 126.9 (W) x 91.9 (D) x 57.5 (H) mm Appearance size: 1573mmx380mmx400mm Weight of the whole machine: 38KG