Public address system marine telephone Range For subway, highways, power plants, gas stations, docks, steel companies.Moisture and fire resistant, anti noise,dust,frost,especially used in places where special requirements are needed. The IP66 weatherproof telephone is designed to use in the temperature between -40 ~ +60 °C. its technical indicators is highly advanced. Feature 1) Automatic PA 2) Easy to use, plug the phone line crystal head into the phone jack, and then connect the speaker wire, it can work perfectly. 3) After the telephone line is plugged into the telephone hole,its function is just like home telephone.It has the only phone number, and can dial domestic landline and mobile phone numbers. While other phones can also call this telephone. The difference is that the telephone is weatherproof and explosion proof and can find someone by public address. 4) The telephone can also make up an independent proof telephone intercom system with PBX and couplers. 5) After the call system is formed, each phone is an independent workstation, if one of them break down, it does not affect the entire system. 6) the product has an automatic gain function, the voice does not vary because of the volume or the length of the distance. 7) the volume can be adjusted freely Technical parameter defend degree IP 66 EX mark Ex-de[ib]ib II BT6 DIP A20 TA,T6 output voltage AC220V 50Hz working current ≤0.2A Frequency response 250~3000 Hz ambient temperature -40~+60°C atmospheric pressure 80~110KPa relative humidity ≤95% amplify output power 10~25W continuously adjustable size 343X294X206mm weight 10kg installation wall-mounted Details Phone casing 1) Aluminum alloy shell, casted by 800 tons die casting machine, the thickness is 6mm, weighs about 8KG, high mechanical strength and impact resistance. 2) Shell surface is electrostatic sprayed in high temperature, antistatic ability is good. Eye-catching colors and it will not fade in 10 years. 3) The telephone shell is patented design, the other waterproof cover is not needed, beautiful and practical, Patent No.: 1,581,443. 4) Shell protection grade: IP67, waterproof and dustproof, anti-corrosion. Key components: 5) Telephone internal circuit is developed independently by our company, international double sided integrated circuit , with the strength of anti-noise high sound quality,clear call, stable and so on. 6) The key components are noise canceling handset, hanging fork, keypad, which are all produced by ourselves with strict quality control, safe and fast, cheap. 7) The keypad of the telephone is patented design of our company ,with stainless steel panel, zinc alloy keys, the contact resistance ≤ 30 ohms, life ≥ 200 million times, pushing intensity 160-200 grams. Patent No.: 1,754,789 8) Professional waterproof handset, imported explosion proof PC plastic, teflon wire, and the industrial-grade anti-noise microphone is also used, call is still clear in 115dB environment. This handset is international CE certification approved. CE Certificate Number: PS2010120310-2 9) The hanging fork is made of zinc alloy, with magnetic sensor switch, life service ≥ 50 million times How to use 1) The caller pick up the telephone handset, dial the phone number of the called and then the telephone will ring 2) But if no one answers the phone after it rings 6 times (1-7 times adjustable), the called people's telephone will automatically switches to the speaker PA, if so, the caller can shout to the called through the public address. 3) When the called hear the shout and picks up the handset, they can chang to normal communication and the speaker will turn off automatically. 4) If no one answers the telephone in one minute, the call will be automatically disconnected. 5) The telephone can work with a public speaker. The connection diagram is as follows: We have specialized in industrial telephone used for harsh and hazardous environment, like explosionproof telephone, waterproof telephone, jail telephone etc. If you have any inquiry, please feel free to contact us. Thank you!