1)  Will jammer interference the other electronic equipment to be in good working condition?
No. Because the electromagnetic signal sent by jammer are totally used in the  band that regulated by government and just have interception effect to cell phone communication.
2) Will jammer have bad effect to human body and cell phone?
You should not worry about it. The intensity of electromagnetic signal sent by  jammer is in compliance with the national standard of environmental  electromagnetic wave health, the signal  sent  by  jammer  is relatively small and no damage will appeared on human body according to the testing files. Mean-while,this device is just damage the receiving condition to cell phone and  makes the normal connection between cell phone and base station impossible. Therefore, no damage will occur on cell phone itself. 
3) Is there any difference of distance between using jammerindoor and outdoor£¿
Yes. Generally speaking, outdoor signals is bigger than the indoor signal. Thereby, the shielding effect is worse outdoor. Strictly speaking, whether using indoor or outdoor, the effective distance of interception is related to the surrounding environment as the distance between different base stations, positions of installation, etc. 
4) Is the jammer has the same effect to GSM cell phone and CDMA cell phone£¿
The capacity of anti-interference of CDMA is much better than GSM cell phone. So the interference effect for GSM cell phone is better than CDMA cell phone.
5) The shell of jammer will become hot after working for some times. Does the long-time keeping in working condition will damage the machine itself£¿It is very normal. When design, We are thinking of taking use of the conductivity of metal shell to help the heat sinking during our designation, by this way, the machine can be kept in good working condition for long time.

Mobile Phone Jammer and Directional Antenna,Angle is 120:

Please keep Mobile phone jammer is more than 200 meters long from Mobile Station: