Earphones With Adjustable Volume
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Related Faq
Q
Is the threshold CO level for triggering the alarm adjustable? Is the volume of the buzzer alarm adjustable, or defeatable?
A
Thank you for contacting us. This portable CO gas monitor can freely set the concentration of the alarm value. The sound can be turned on or off The operation is as follows: In the test interface short press the button to turn off the sound (the default is to turn on the sound at boot), at this time the speaker pattern in the upper left corner of the screen disappears. Short press the button again to turn on the sound again." 
Q
Can I connect Bluetooth earphones from other brands?
A
Yes, M3 can be connected to any brand of Bluetooth earphones for intercom. 
Q
The filter is adjustable in several gears
A
5 gears adjustable 
Q
Is it an adjustable filter ?
A
Hello, this is a variable nd filter, could change the stop from 3 Stop to 7 Stop 
Q
What is the adjustable size?
A
It can be adjusted by up to 60cm in half. 
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