From observing electrical wiring according to the building is embedded in the wall cabinet and then present a sky electricity monitor AC (AC) By using the Light emitting diode and LED bulbs are known as sound in General.
The observed power lines along the building is embedded in the wall, and the Board proposes Monitors electric blue alternating (AC) using light-emitting diodes, known as LED lights and sounds that are used everywhere.
From the observation of cables along the building is embedded in the wall, I and the proposed detector electric ฟ้ากระแสสลับ (AC) using the light-emitting diode and the voice. The so-called tube LED with in general use.