3. Distance barrier-free 300 meters penetration, strong penetration performance, receiving distance to the Air-to-Ground linear distance can reach 300 meters, note: the actual received signal visual environment changes, different signals due to obstacles are different
4. Easy to install: press the button, ring the bell in the room, the receiver installed in the room can be plugged in, receiver intelligent flash, the bell lights
1X double-sided adhesive
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