... , multiple application, wireless communication. Reliability, fast download and low price POS POS Technical Characteristics Microprocessor: ARM9 32bitMemoryz; SDRAM 8MB, Flash ... 16-grade grayKeypad:18 silicone key, dust proofPort: 2xRS232, 2xUSBBase printer: High-speed thermal , width 58mm, roll ø50mmDevelopment tool: SDK ... Internal 3.7v 1000MAh Lithium battery Wireless Retail POS Terminal with Printer