Emergency phone at airport need to be well treated

The emergency phone installed at the HONGKONG Airport over 3 years, we come to check and its looks very nice and very new, the voice is clear and big sound. Why? Because the stuff protected it very day. keep clearing this help point is very necessary!  This phone with induction loop and braille alphabet for disable!  So this also called safe telephone. www.sostelephone.com/www.koontech.com

https://www.youtube.com/watch?v=DDWAMuiRW1Q