thodukonics 2 User wireless Intercom 900Mhz Very clear voice all time suitable for 3-5 floor or 50m to 300m Corded Landline Phone  (White)

900Mhz 2 USER WIRELESS INTERCOM SYSTEM: 900Mhz wireless Intercom systems, which is works in world open band . You can call between TWO intercoms. You need just plug this wireless intercom to any of your 90~250V outlet with in the range limit. Installation finished. No Static,. (Not required plug to with in same transformer / same phase as our power line Intercom). It works just like normal land telephone. You can hear the ring back tone only if the other intercom is ringing and when the person lift the hand set, you can communicate each other. It is using Encrypted Automatic Frequency Hopping Technology and range of about 300 meter in open Land, 50m-70m in indoor. We have also 1Km range models and Battery backup Model.. 900Mhz World Open ISM Band Wireless Phone. Expendable up to 1000 phone (Only on Model ISM1600) Range- 300m (open Land) Encrypted Automatic Frequency Hopping Technology , Super Anti-Jamming Capability , Full Duplex communication, Original Ring Back tone , Comes with adapter for U.S. OR 2 pin round European plug. : Advantage: It is 900Mhz wireless intercom it will work anywhere with in range limit. Crystal clear voice all time. Range 50m indoor and 300m line of sight. You will get more range than 2.4Ghz wireless Intercom. (3000m model available on request) It is expandable up to 1000 phone and can communicate each other (Only on Model ISM1600) Battery backup available on request,, Disadvantage: Price vey higher than our power line model Intercom. Working range will decrease with obstacles like concrete/Glass wall and buildings. ..Multi User Youtube: https://youtu.be/K2V-gapp7p4