3 Support external HOM I to AV input
Support external DVR
Detachable Patch
Snap joint assemblies allows easy replacement and maintenance.
Replaceable sponge
Using Velcro as a bridge, sponge and flannel can be easily replaced, and Velcro can be used for a long time.
18650 Battery Case
18650 BATTERY CASE 7.4V 18650 LI-ION battery case with integrated USB charger and LED indicator (2×3.7V LI-ION
18650 style cells not included) Low battery waming : Buzzer warning if input voltage drops below 6.8V.
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