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1) Suitable for home, hotel and hospital 2) Double dingdong sound 3) Sender: DC 9V (6F 22) 4) Receiver: 3V 2 x AA batteries 5) Frequency: 433.92 Hz 6) Remote distance: about 30 meters 7) One sender can control 2 or more receivers
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1) Suitable for home, hotel and hospital 2) Double dingdong sound 3) Sender: DC 9V (6F 22) 4) Receiver: 3V 2 x AA batteries 5) Frequency: 433.92 Hz 6) Remote distance: about 30 meters 7) One sender can control 2 or more receivers
