Item Type: Card Reader Material: ABS Working Frequency: CN : 920-925MHz US: 902-928MHz Labeling Protocol: For ISO18000-6C (EPC GEN2), ISO18000-6B Frequency Hopping Method: FHSS or fixed frequency, which can be set by software Antenna Parameters: 2dBi circular polarization antenna (built-in) Output Power: 12.5dBm-26dBm (software adjustable) Reading Distance: Maximum Reading Distance of Tags: Approx. 0.5meter or 1.6ft (related to factors such as transmit power, antenna type, tag type and application environment) Maximum Distance for Writing Tags: Approx. 0.2meter or 0.7ft (depending on factors such as transmit power, antenna type, tag type and application environment) Working Mode: Active mode, passive mode, answer mode (not recommended) External Interface: Power Interface: DC and5V Communication Interface: USB virtual keyboard Working Environment: Working Temperature: -20℃-55℃ Storage Temperature: -40℃-85℃ Power Adapter: USB powered RS-232 Signal Line: Equipped Power Cable: Equipped Development Kit: Provide SDK Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.