It can work at DC3 to 12V, but it will not or little flashes when the power below 9VDC.
Features:
This Mini Wired Strobe Siren will sound&flash when it connect power. It is used together with the alarm security system usually, loud with 110 dB and strobe. Replace the old or broken siren
Easy to install, wired design let you directly connect with your alarm security system
Sound 110dB and RED strobe
ABS Housing, durable for long term use
Specifications:
Working Voltage: DC9 to 12V
Rated Current: 280mA
Siren sound: 115DB/1M
Size: 120 x 70 x 48mm
Material: ABS housing
Color: red & white
Net Weight: 89.2g
Package Includes:
1x Mini Wired Strobe Siren
Screws for installation