Surveillance camera has a simulation camera and web camera two, what is the difference? Also, the use of wireless walkie-talkie need to state approval?
Walkie-talkie who want to use who, no difference, generally can be universal
. the line of fire installed to the gate of the gate, the zero line at random (in fact, parallel to random) .. pay attention to the device voltage 220V free to pick. Can not be. The two sides of the line is the fire line and the zero line. Install the socket .. can.
The solution is simple, please change the time period or on another target site
You can not use ordinary wires or telephone lines as audio lines, because the transmission of audio signal line is the need for a shield, if there is no shield, it will be sensitive to clutter or interference signals, these signals with the audio signal transmission, It will cause the audio signal is chaotic, seriously affect the signal quality, or even can not be used. 3.5 connector with shielded two-channel signal line, the shield ground, (that is, the largest piece of solder joints), the core connected to the left and right channels, (that is, the two solder pads smaller solder joints Yes).
