| Physical Characteristics | 
    | Sheild PCB Only | 
    70 (w) x 95 (d) x 19 (h) mm | 
    | PCB with Arduino MKR | 
    70 (w) x 95 (d) x 25 (h) mm 86 x 118 x 12.5 mm (with terminal block connector mounted) | 
    | Environmental Characteristics | 
    | Operating Temperature | 
    0°C to +60°C | 
    | Storage Temperature | 
    -30°C to +80°C | 
    | Electrical Characteristics | 
    | Input Voltage | 
    6.5V - 32V DC on J2 or 5V DC through the Arduino MKR Micro-USB Port | 
    Power Consumption Idle: Operating: | 
     1W  2.3W with 5V Micro USB Input, 3.7W with 24V Input | 
    | Available Voltage Outputs | 
    Power In, 5V/DC, 3.3V/DC | 
    | I/O Port Characteristics | 
    | Inputs
     | 2x Opto-Isolated | 
    | Output
     | 4x Open Collector Output to drive external WS2812B RGB LED string (in series with Device Status LED) | 
    | Indicators | 
    | LED's
     | 2x Input Port LED's 4x Output Port LED's Device Status LED RF Field Activated LED  RF Field Error | 
    | Audio
     | Buzzer | 
    | RFID Characteristics | 
    | Frequency
     | 920-926MHz, UHF | 
    | Standard
     | ISO-18000-6C | 
    | Power
     | 0 dBm to +27 dBm (0 dbm to Max. 21 dbm with 5V Input) | 
    | Antennas
     | 1x Internal PCB, 1x RP-SMA port for external Antenna |