User Manual

2
19. Lock hole
Power Supply
Before using the device, users can choose battery charging or
DC power supply according to their needs. If you choose battery
power, please insert the batteries first. This device supports 1.5 V
AA batteries and 3.7V 18650 lithium batteries.
♦ If you choose to use 1.5 V AA batteries, please open the
device and find the battery compartment, insert 4*1.5 V AA
batteries. When inserting the battery, make sure that the battery
polarity is correct.
♦ If you choose to use 3.7V 18650 lithium battery, please open
the device and find the corresponding battery compartment,
which can be loaded with 1 or 2 3.7V 18650 lithium battery.
When installing the battery, ensure that the battery polarity is
correct. (The 3.7V 18650 lithium battery of the device can be
charged with a USB charger above DC5V1.5A, the indicator light
of the case will turn on red when charging and the red light will
turn off when fully charged)