Weatherproof Expand Volume Phone

2.  Can use in a strong noise environment
3.  Door cover: orient automatically and good self - closing, convenient for use.
4.  Works with any standard telephone line. No external power or battery back up required.
5.  Handset: made of special engineering plastic, high anti-knock resistance, Weatherproof, armoured cable optional.  

6.  Magnetic reed hook switch .
7.   Noise-Canceling Microphone option is recommended for loud environments.
8.   Handset integrity wiring to enable the telephone system to check if the telephone unit is still operational.

9.  All of the components including keypad, buzzer, circuit board and cabinet are designed to be multi - layer waterproof and dust - proof which is up to Class III grade. The whole machine is up to national standard GB4208-93 IP 66.

10.  Phone is provided with high stability, high anti-jamming capability standard to GB/T 15279-94.

11. High power amplifier(30-60W),In a Open ground, within one hundred meters can be clear to hear
12. can be set to provide automatic dialing, do not need this feature users can cancel it

13. shell die-casting, shell weight 10 KG, explosion-proof surface with 27mm, very strong, waterproof anti-destruction over all domestic weatherproof phones

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