Operating system:Microsoft Windows CE 5.0 OS Communication:WIFI,GPRS,GSM,Bluetooth Frequency:13.56MHz Functions and Features:1. Compact, portable, and durable.2. Long working time: The product can work for more than eight hours consecutively. 3. Easy charging: The product uses a USB interface for charging without a specialized data line. You can charge the device anytime anywhere as long as there ...