the coverage is very good. we put in one end of the house and we called it from the other end. it was working fine.then we tried from the neighbour. still working. the intructions are not enough, there some buttons , still i dont know what they are. it doesnt have different channel for each terminal. they start to ring together. sometimes it gives different ... Read more
around 433MHz - good range - PLL receivers The receiver responds very qick I like two LEDs on the transmitter I also like the alarm sound Buttons on the receiver do nothing , I believe the keyring will fall off of the receiver very soon The receiver uses 2 batteries I believe it should use only one Not too loud siren Receivers not protected against ... Read more
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