Beijing three good clothing store specializing in the supply Inner security access control, EAS, a book file security, factory direct trustworthy! Installation width: 0.9m-1.8m Sr-320 product features aluminum alloy material, the whole body alloy design, billboard set extremely resistant; using DSP (digital signal processing) self-test technology, AGC technology effectively? identify, filter and suppress environmental interference, to achieve high alarm, low false positives desired effect. ? Technical Specifications: Dimensions: 153 * 41 * 7.5cm Operating voltage: 24V DC; Operating frequency:?? 8.2 Mhz; scanning frequency:? 180 ± 1hz; Body Colour:? Silver;