# A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
Vibration Detector | 振动探测器
These detectors react to vibrations generated during a break-in using a piezoelectric sensor.
Video Surveillance | 视频监控
A type of security that uses a digital video recorder (DVR) as well as security cameras to monitor a location. Video footage is stored on the DVR and can be retrieved. Most video surveillance systems give the user the ability to look in live to their property over an active internet connection allowing them to monitor the site from anywhere.
Volt | 伏特
The volt (V) is the base unit of electric potential, electric potential difference (voltage) and electromotive force in the International System of Units.
To calculate volts, the current is multiplied by the resistance. (V = A x Ω)
Voltage | 电压
Voltage is the potential difference between two points, expressed in volts.
Volumetric Protection Coverage | 体积保护范围
Ideal for protecting wide areas in need of detection, such as rooms in a house, garages, shops etc. The area of coverage is broad, approximately 85°.
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