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Portable night vision devices
Portable night vision devices were first previously used to locate enemy targets at night. Night vision devices are still used extensively in military systems for navigation, surveillance, targeting, and other purposes in addition to those ment...Read more -
Smart doorbell
A smart doorbell is an Internet-connected doorbell that notifies a homeowner's smartphone or other electronic device when a visitor arrives at the door. Smart doorbell lithium battery model: 3.7V 5000mAH Smart door...Read more
