Coverage: 0.9-1.5M (related to specification of label/tag) Center frequency: 8.2MHz±0.5MHz Pedestal: purpose made triangle aluminum pipe Bottom case: Iron Color of Bottom case: Silver Configuration: Standard 3300 main board. Adopted dynamic noise suppressing technology. Infrared recognition system makes the rate of false alarm near zero in ideal environment. DSP main board is addible. Assembled with Plexiglas. Nice appearance.