About HA39928P-T Intercom Telephone

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There is no connection charge or call rate. From the 2nd telephone bed room to the gate, the office adjacent to the room, from one end of the show room to the other, the factory where you want to talk is free. Only then will he be able to apply it in the second telephone set. Will work upto 5 kilometer. Run in any current or battery. There is no problem setting up.