
barcode or QR code to be scanned (it is recom
mended to keep the distance above 3cm), and
press the button until the code scanned. After the
device scans the code successfully, the buzzer
sounded, and the green indicator will flflash once,
indicating that the code scanning is successful.
2.2. Maintenance
The shell of the device can be wiped with a clean
soft cloth. If needed, user can use a small amount
of detergent add to water, and wipe with a soft
cloth.
If the device responds slowly, clean the scanning
area in time. Stains and dust on the scanning area
may lower effiffifficiency. When cleaning, the user
should use good facial tissue and gently wipe, If
the paper with poor paper quality is used for
wiping, the surface is damaged and it will reduce
the effiffifficiency
2.3 Fault handling
If the device does not work properly, perform
as follow:
Ensure that the device is connected with
the host. Check whether the data cable is
correctly connected with the host, which
includes whether it is firmly connected and
whether the original data cable is used.