HTZSAFE | HTZSAFE--4040S (Volume Adjustment) @htzsafe9576 | Uploaded 5 years ago | Updated October 17 2023
How to adjust the volume of the alarm receiver (up to 4 volume lelves adjustment)
After-sale service: support@htzsafe.com
How to adjust the volume of the alarm receiver (up to 4 volume lelves adjustment)
After-sale service: support@htzsafe.com