Functional Features：

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Used in conjunction with the HY5714B1 bus fire telephone jack. HY2713 multi line fire portable telephone extension is a supporting device of the fire telephone communication system. The telephone extension is flexible and convenient to use, and the telephone handle has a built-in communication circuit; Compact in size, affordable in price, and easy to install. Inserting the telephone extension into the fire telephone jack can call the fire telephone switchboard, providing a convenient and fast communication method for the fire scene. It is an indispensable communication device in the fire linkage control system.

Technical Parameter：

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Working current 17~31mA
Frequency range: 300~3400 Hz
Distortion:<10%
Socket specification 3.5mm
Dimensions: 210mm (height) x 50mm (width) x 40mm (thickness)