this link is LED BUZZER
1. installation size:16mm
2. contact structure:0NO+0NC,2pins
3. pins:silver with gold plating
4. continous sound & LED
5. sound: 70 to 80dB within 0.1m
6. color: red
7. shape: round rectangular
8. LED:12V,24V (only red color could be illuminated)
9. protection level:IP40