1, although the N97 has a touch screen, you can use the screen to input text; But for N97, it is far from enough, adding a QWERTY keyboard on the phone, which is also a trend of future mobile phone development, the keyboard uses a side slide cover style, after pulling out the slide, the screen can be further tilted up 30 angles, which is the use of ergonomic design principle, expert analysis: "People look at the screen from a 30 degree Angle is the best Angle."
2, has been listed N97 domestic licensed version nowDivided into standard retail edition and limited edition, both versions have a dazzling white and cool black color choice. The white version is noble and elegant, and the black body is more stable. It is reported that NOKIA has authorized the exclusive purchase of limited edition sales.
3, the European version is generally brush the continental version of the software, signal quality and other aspects are also good, worth buying, the quality of Finland is at least not worse than the goods, I have used N NOKIA European parallel goods before, there is no problem in quality. The signal frequency in North America is not the same as ours, so the signal of the North American version is not very good, and it is the least worth buying.
1, the overall design of Aqara water sensor is like a big button, the indicator light and the key are in the UV material shell, can do the flooding monitoring, if the water level reaches 0.5mm, the water sensor will be reported to the gateway, the gateway will issue an audible and visual alarm, and the mobile APP will also have a reminder, so that the user can deal with it as soon as possible. __ Of course, the water sensor has reached the international IP67 protectionDust waterproof grade standard, can be used normally in wet, dusty places.
2, Xiao Ai students control aqara switch is actually very simple to achieve, first follow the steps to aqara switch and Mi Jia APP bind, bind successfully in Mi Jia app Settings to find the authorization, and then to your small love students add aqara switch authorization can be used, This is the small love speaker control aqara switch method.
3, Aqara suite was officially released, it supports both rice home and Apple HomeKit, so that you can use 100Little love students control more money, you can also use the iPhone Siri directly control, little love and Siri's two nannies to serve you. Green meter Aqara smart switch panel D1 Green meter Aqara smart switch panel D1, support millet millet timing wireless switch wall free wiring mobile phone remote control smart home new D1 zero fire three keys.
4, switch socket air conditioning partner Air conditioning partner to achieve ordinary air conditioning intelligence, remote control of air conditioning cooling, heating.
5, part of aqara's smart home products support Tmall Genie, but not all supportThe Tmall Genie. I have tried before, aqara including air conditioning companion, curtains, sockets, switches have been supported into the Tmall genie, if your home is using the aqara brand of smart home system, it is recommended that you use small love students or use Siri to control the smart home, if you want to use the Tmall Genie is also OK.
1. Video baseband transmission: YesThe most traditional TV monitoring transmission method does not do any processing on 0 ~ 6MHz video baseband signal, and directly transmits analog signals through coaxial cable (unbalanced). Its advantages are: short distance transmission image signal loss is small, low cost, stable system.
2, wireless has no medium to speak of, only what frequency is used, generally 801a, b... Such protocol group, the frequency is generally 24G, 54g and so on. The device has wireless AP, wireless routing, wireless bridge, etc.
3, wireless transmission media are: radio waves, infrared, microwave, satellite and laser. inIn local area networks, only radio waves and infrared rays are usually used as transmission media. Wireless transmission media are usually used to connect wide area links of the wide area Internet. An electromagnetic wave in the radio-frequency band propagating through free space, including air and vacuum. Radio technology is the technology of transmitting sound or other signals through radio waves.
4, or I will answer you: the network transmission medium is the entity that transmits data in the network and connects the network sites. Network information can also be transmitted using radio systems, microwave wireless systems and infrared technology.
5, commonly used wireless transmission media main packageIncluding radio waves, microwave, infrared and so on. First of all, radio waves are the most commonly used medium for wireless transmission. It has a long transmission distance and strong penetration ability, and can easily pass through obstacles such as buildings and hills. Radio waves are widely used in various wireless communication scenarios, such as radio broadcasting, television broadcasting, and mobile communication networks that we use every day.
6, the types of wireless media are mainly the following: electromagnetic waves. Electromagnetic wave is the medium of radio signal propagation, covering radio wave, microwave, infrared, visible light, ultraviolet and other frequency bands. In wireless communication, information is modulated