Portable 4g cell phone jammer are legal to school?

     4G Cell Phone Jammer Tanking use of super-high frequency and mini-power interference technology, high efficiency
    Effectively making subsection, just interfering downlink and no interception on the base station

Extreme portability, the weigh for machine itself is just 68g 4g cell phone jammer in school 

Low power consumption, working time for machine is about 2 hours, supplied by battery
Slow start us design of circuit .These elements can maintain the s table operation condition with high integration http://www.4gcellphonejammers.com/

4g cell phone jammer doesn't Look like a normal jammer,Top Hidden
Internal antenna,and Insulate per antenna,It can working more efficiently

Battery can be replaced very easily by hand,Same with mobile phone
Can be charged by Nokia charge

High Quaility Design,Low consumption

The jamming distances we mentioned on website are for customer's reference only. The actual jamming distance will be varied depending on the signal strength and the use location and if full charges, etc. 4g cell phone jammer