Spec：

• ● Power Supply：DC-6V，It supplies by each elevator phone（ with DC-6V battery）
• ● Power Consumption：Standby 2mA˙Max. 30mA
• ● Case Material：A B S plastic
• ● Dimension：139mm ×66mm ×50mm

Function：

• ● 1.It communicates with elevator phone
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