LAY7 series push button switches is to be used for control, signal and chain in control circuits with AC 50HZ or 60HZ and voltage up to 660V, or DC with voltage of 440 and below. The product combines the features of advanced products made by internationally well-know companies. It is small, beautiful, reliable, which is a new generation of similar products. The components of the product are made of quality flame retardant material and the contacts are made of silver alloy material. The button switches consist of operation mechanism and contact base, which are assembled as toy bricks. The normal open and normal close contacts are electrically separated. The tail with several nodes is rung and fastened together, which is easy to fix and disassembly. This series products are in conformity with the standard GB1048.5-1993