RFID Guard patrol, waterproof and Shakeproof, resist low temperature, automatically reading tour control system. Product Description:NC40U ... Features:RFID Guard patrol, waterproof and Shakeproof, resist low temperature, automatically reading tour control system, performance of ... to PC by USBPrompt: LED flashAnti-blast: ExiaIIBT4Application:Guard patrol monitoring in shopping mall, supermarkets, hotels, ...