KD9561 CK9561 Alarm Module DIY Kit 4 Kind of Sound

KD9561 CK9561 Alarm Module DIY Kit 4 Kind of Sound.

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;