30w built in amplifier industrial telephone

{"cid":"91210763","title":"30W Built-in Amplifier Industrial Weatherproof Telephone for Tunnel and Prison Emergency Communication","imgUrl":"https:\/\/img.chinax.com\/nimg\/8d\/99\/03b09b1c905537bf3a6ad50c0dbc-200x200-1.jpg","attrs":{"Price":"399","Minimum Order Quantity":"2","Model NO.":"YT-SG30","Hardware Technology":"Board","Type":"IP-SIP or Analog","Enclosure Material":"Aluminium","Enclosure Thickness":"9mm","Handset Material":"PC+ABS","Cable Tube Material":"Telescopic Stainless Steel","Cable Tube Load":"200kg","Keypad Material":"Silicone\/Stainless Steel","Buzzer Power":"3W","Buzzer Volume":"90dB in One Meter","Built-in Amplifier":"30W","Power Supply":"Poe\/Gateway\/External Power Supply","Protection Grade":"IP68","Rated Voltage":"DC 12V\/AC 220V","Operating Temperature":"-40\u00baC ~ +70\u00baC","Installation Method":"Wall-Mounted\/Pole-Mounting"}}