RF IDeas RDR-80581AKU

• Typical maximum read range: 1.0” – 3.0” (2.5 – 7.6cm)
  dependent upon proximity card type and environmental
  conditions. Slightly diminished performance for certain
  card type as compared to pcProx/AIR ID reader.
• Dimensions: 3 3/8” x 2” x 0.6” (8.57cm x 5.08cm x 1.52cm)
• Weight: 0.45 lbs (204g)
• Power supply: USB self-powered, 6ft cable
• Indicators: Tri-state LED, dual tone beeper
• Transmit frequency: 125 kHz & 13.56 MHz
• Operating temperature range: -22° to 150°F (-30° to 65°C)
• Operating humidity range: 5% to 95% relative humidity,
  non-condensing
• Storage temperature range: -40° to 185°F (-40° to 85°C)
• Interface: USB
• Certifications: FCC, United States; CE Mark, Europe;
  C-TICK, RoHS, Industry Canada, UL

Manufacturer site