It is the function selections of cell phone jammer

It is the function selections of  cell phone jammer .
Emission values of less than 1.0 watts / kg, its not harmful to humans. The Bluetooth antenna is not on board the middle, otherwise interfere too much, the effect that the poor can not use. Fixed the antenna bracket and the motherboard must have a positioning hole of the card hook is recommended fixed with screws. Can not use the gum way, repeated disassembly after the loss of reliability. Antenna test plug must be fitted to the 3D model, to prevent the physical assembly inserted in the end. Contact of the antenna: the antenna and the antenna nut contacts the positioning of the antenna nut antenna shrapnel, contact antenna shrapnel and antenna contacts on the motherboard. (Radio antenna). The antenna stretched out the antenna on the antenna shrapnel and motherboard contacts contacts. The advantages of simple structure, save the parts.  Structure space allows, the piano keys can also be without steel plate instead of a steel plate with a PC bracket, the thickness of the PC bracket ≥ 0.50MM. PC bracket of the piano keys, if no special note should be added the black mylar shading film thickness of 0.1mm. The keycap pulling force to achieve 1.5 kg with the manufacturer to confirm this point. For the Pc holder piano keys, pay attention to before positioning tendon length of the shell must be sufficient positioning lived Rubber. The best is directly on top of the PCB and Dome. Located only on the holder, then will cause the key string to move, uneven appearance of the gap.
Need to do the Φ1mm above, to ensure that the roots of anti-plastic capacity under preload fillet, fillet the greater flexibility the better. More than 20mm size control in the +-0.1mm; top-level flatness control +-0.1mm; To prevent ESD, however, point pen side after the shell opening is smaller. No device or point pen side of the board and all the flooring. Depth 4mm or written plastics to the shell to prevent the test static hit the barrel (this is just preparation for the tests, the user or will the pen pull out, static electricity will still be put on the pen was thus suggested that the first two method). Note point pen and not below the deck, connectors and other static-sensitive devices. Take the cooling function of cell phone jammer for another example.The manufacturer should provide some information about the shielding rang of cell phone jammer 
Chemical structure a polyolefins - polyethylene (PE), polypropylene (PP), high molecular weight polyethylene (UHMPE), polystyrene. Polystyrene (PS), acrylonitrile - styrene (AS), acrylonitrile - butadiene - styrene copolymer (ABS), b poly the milling amine - different kinds of nylon c polyether - poly carbonate (PC), polyoxymethylene (POM), Feng (PSU), poly crystalline material of the crystal morphology classification under the right conditions to produce the geometry of the crystal structure of certain kinds of plastic (such as PE, PP, PA POM, PBT) and amorphous plastics. Molecular shape and molecular arrangement of the crystalline structure showed disorder-like plastic (such as ABS, the PC, the PSU, PMMA, PS) 3. Heat showing the fundamental behavior of thermoplastics.  cell phone jammer  has the cooling function.