Label Agreement: ISO18000-6C (EPC GEN2) Frequency hopping method: Broad spectrum frequency hopping (FHSS) or fixed frequency that can be set by software Antenna parameters: 2dBi circular polarization antenna (built-in) Output Power: 12.5dBm to 26dBm (software adjustable) Reading distance: Up to 0.5m (varies based on transmit power, antenna type, tag type, and environment) Writing distance: Up to 0.2m (varies based on transmit power, antenna type, tag type, and environment) Operating modes: Active mode, Passive mode, Answer mode (not recommended) Power interface: DC +5V Operating temperature: -20°C to 55°C Communication Interface: USB virtual keyboard Storage temperature: -40°C to 85°C Power source: USB powered Color: White Material: Plastic Note: Product appearance may vary slightly by batch; this does not affect functionality Package Contents: 1 x UHF Reader, 1 x data cable Item in picture may appear slightly different in color due to lighting and screen settings Measurement error allowance: +/- 1-3 cm