What is the Closing Bell?
It is mainly used in commercial residential buildings. Through calling, there is a visual dialogue to determine the visiting identity.
Video doorbell
- Chinese name
- Video doorbell
- Foreign name
- Video door phone
- Main application areas
- It is mainly used in commercial residential buildings. Through calling, there is a visual dialogue to determine the visiting identity.
- The English name of the video doorbell is Video door phone or Video door bell.
- Video doorbell system is a kind of equipment used in high-rise residences, apartment buildings inside and outside, indoor information transmission, anti-theft door control, and in the case of emergency, residents report to the building duty room. It is widely welcomed by users for its complete functions, reliable performance, large capacity, beautiful appearance, convenient installation and use, and safety.
- The system is mainly composed of main unit, extension, UPS power supply, electric control lock, decoder, protector, video amplifier, signal repeater, signal converter, video switcher, host selector, network aggregator, hub, digital signal converter , Optical transceiver and door closer. According to the type, it can be divided into direct-press type, digital type, digital HHV, direct-press video intercom, digital video intercom, digital HHV video intercom, and so on.
- The video doorbell uses 2.4G video transmission technology. This frequency band is an internationally prescribed free frequency band. It does not need to pay any fees to relevant international organizations. This provides necessary advantages for the development of 2.4G wireless technology. And 2.4G wireless technology is different from the previous 27MHz wireless technology, it works in full duplex mode transmission, in terms of anti-interference performance has an absolute advantage over 27MHz. This advantage determines its super anti-interference and transmission distance up to 10 meters. In addition, 2.4G wireless technology also has a theoretical data transmission rate of 2M, which is double the theoretical transmission rate of Bluetooth's 1M. This technology is added to make the video doorbell more stable. [1]