◆ Wire system and bus system compatible, holographic spot real-time report ◆ Programmable multi-mode 2*2 system, more flexible in installation ◆ Unique DSP chip, patented multi-dimensional mistake-corrective code, true detection alarm technology. ◆ Unique displacing receiving, transmitting parts with big power, power surplus rate reaches 90% ◆ Omni-bearing secluded decorative design, which has cleared away the trouble of dead-angle ◆ Patented big-diameter coaxial aspherical lens with double focus