Public telephone keypad with volume control button B517

Short Description:

This keypad with the material of rugged zinc alloy, and it is used of vending machine.

We are mainly specialized in the production of industrial and military communication telephone handsets, cradles, keypads and related accessories.

Product Detail

Product Tags

Product Introduction

It is a keypad which designed for prison telephone with a volume control button and matched telephone control board. The surface treatment could be made with chrome plating and also could be made with shot blasting for industrial area use.
With the location near to Ningbo Port and Shanghai PuTong airport, the shipment method by sea, by air or by express, or by train are available. Our shipping agent can help arrange shipping with good cost, but the shipping time and any problem during shipping couldn’t be guaranteed 100%.


1.The conductive rubber for this keypad with waterproof function and matched with keypad frame drain holes, the waterproof grade of this keypad IP65.
2.The conductive rubber is made with carbon granules with less than 150 ohms contact resistance.
3.The working life for this keypad is more than 1 million times.
4.It is made with alternative interface.



It is mainly used for prison telephones or any other machines which needs volume control buttons.



Technical data

Input Voltage


Waterproof Grade


Actuation Force

250g/2.45N(Pressure point)

Rubber Life

More than 2 million time per key

Key Travel Distance


Working Temperature


Storage Temperature


Relative Humidity


Atmospheric Pressure


Dimension Drawing


Available Connector

vav (1)

Any appointed connector could be made as customer's request. Let us know the exact item No. in advance.

Test machine


85% spare parts are produced by our own factory and with matched test machines, we could confirm the function and standard directly.

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