280W 14-Channel Full-Band Desktop Signal Blocker – 360° Omnidirectional This 140W 14-band directional desktop signal jammer is engineered for high-power, targeted signal denial in large-scale security environments. This professional-grade interference system simultaneously blocks all major communication signals including 2G, 3G, 4G, 5G cellular networks, triple-band WiFi (2.4G/5.3G/5.8G), GPS L1/L2-L5 positioning signals, VHF/UHF walkie-talkie frequencies, and Lojack vehicle