? Beijing three good professional supplier of EAS, a security instrument supermarket goods, shopping burglar alarm Sr-3333 Product Features High-strength plastic material, shape streamlined design, beautiful, durable; special faint alarm signal recognition technology. Automatic adaptive, self-detection technology, automatic gain control technology to effectively identify, filter and suppress the external environment interference, to achieve high alarm, and correct report of the desired effect performance parameters:? Dimensions: 161cm * 34cm * 10cm detection range?: ? 80-180cm Center Frequency: 8.2MHz; Operating voltage:?? 24V DC; Rated power: ≤15 W; center frequency 8.2 Mhz; scanning frequency:?? 180 ± 1hz