Widely used in IC, liquid crystal, crystals, PCB, optical, precision measuring instruments, photographic equipment. 1. Cost lowering through nitrogen(N2)gas replacement and combination N2 with other substance2. Clearndicated ,Convenient display Temperture(left/green)Humidity(right/red)3. Door frame covered with magnet rubber keeps reliable air-tightness. 4. Tempered glass window.lock-key handle 5 ...