RFID Card Reader 902 to 928MHz 50cm Contactless Portable Multipurpose UHF USB Card Writer for Warehouse Library Item Type: UHF Card Reader Material: ABS Operating Frequency: Chinese National standard (920-925MHz), American standard (902-928MHz) Tag Protocol: ISO18000-6C (EPC gen2) Frequency Hopping Mode: Broad spectrum frequency hopping (FHSS) or fixed frequency that can be set by software Antenna Parameters: 2dBi circularly polarized antenna (built in) Output Power: 12.5dBm - 26dBm (software adjustable) Reading Distance: The maximum reading distance of the tag is 50cm/19.7in (with the transmitting power, antenna type, tag type and application environment and other factors) Maximum Distance of Writing Tag: 20cm/7.9in (with the transmitting power, antenna type, tag type and application environment and other factors) Operation Mode: Active mode/passive mode/answer mode (not recommended) Power interface: DC +5V Communication Interface: USB virtual keyboard Operating Temperature: -20℃-55℃ Storage Temperature: -40℃-85℃ Dimension: Approx. 104 x 68 x 10mm / 4.1 x 2.7 x 0.4inApplications: Widely used in logistics and warehousing management, intelligent parking management, product anti‑counterfeit detection, consumption management, attendance management, catering management, swimming pool management and other systems