First-created active tag delivery device, 2.4G communication, USB connection, low power design, can be provided with sending Communication Interface: USB, plug and play Input voltage: USB power supply, DC 5V Max. Working Current: <50mA RF Power: < 1mW Internet Protocol: Gofar Defined Read Distance: 1-50cm(related to the card model) Dimensions: 68mm×20mm×9mm Working Temperature: -40 °C - +80 °C ...