Connection type:
alarm whistle : SEL1=NC SEL2=NC
fire alarm : SEL1=1 SEL2=NC
Ambulance voice : SEL1=0 SEL2=NC
Machine guns sound: SEL1=x SEL2=1
NC:Dangling inputs
1:VCC
0:GND
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KD9561 Alarm Module Board
6.00 EGP