US VS SIGNAL V7-2 600W alarm can adjust the volume?
If you want to switch the size of the sound, the current machine does not have this feature, but you can manually increase the number of relay circuit to achieve the purpose.
If you really want to sound a little smaller, you can cut off the two speakers of the line, so just like a level of V71.
Professional high-end sirens are unable to adjust the volume, big on the big, small on the small, if you want to do not abuse a little low-key, only when used in an emergency
Alarm device is also a big voice ah, the United States VS V72 is really to the force, the original import is authentic, the sound is, the effect is good, 600W power is real, not like some fake blind blowing power;
