Material:the double power mission switch is made of high-quality -retardant plastic material, which has good insulation, high temperature resistance and safety and reliabilitySilver contacts:This automatic mission switch has silver contacts that are used for movement and static charging, and significantly improves the conductivity and life of the productAdvantage:If the normal power supply is not normal, the emergency power supply works immediately to the continuity of the power supplyThis automatic mission switch has a built-in signal output port with normal standby opening that can be connected to the signal displayThis automatic switch with double power has a small size and good performance, is easy to carry and and convenient to useColour:As ShownMaterial:plasticPackage Contents:1 * mission SwitchOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.