Model:SD-113(RF antenna) Dimension:147cm*32cm(H*W) Coverage: Large Tag:up to 2.1m Mini Tag:up to 1.8m 4*4 Label:up to 1.5m Tips: Gray or white transparent glass plate DSP (Digital Signal Processing)technology (we have a series of eas antenna as sd111, sd112, sd114, sd115, sd115b, sd116, sd116b, sd116c, sd117, sd118) If you are interested in our products,please contact us or visit our website to know more about us,we will reply you as soon as possible ,looking forward to you letters.