... positive direction and 1000m in reverse directionWide-band frequency reception: X, K,ka, VG-2, LASER. VCO technology, ... option, avoid unnecessary interference and ensure ultra low false alarm rate in urban area5. Audio announcement plus ... 150, 24.266, 24.450, 24.680, K-POP Ka Band frequency : 33.8, 33.4,34.3, 34.7 ... , 35.5, 35.1, (ALL KA-Band Detectable) VG-2: 11.02GHz ± 100MHZ LASER: 904nm ...