беспроводной doorbells- QH-1085

wireless doorbell 1.The wireless door bell withDC poweroperated . 2.East to install ,wire free. 3.The distance up to 100 meters with music up to 36 tunes. 4.Different painting available. 5.PCB manufacturing by SMT machine which ensure a stable quality. 6.Auto mache code functionto ensure interfenencecodebuilds unique connection between receiver and buttons which block interference from outside signal. 7.Power saving design with batteries of both receiver and transmitter can be used for 12 months.