1.New EAS Alarm System with wide detectionto 2.5m 2.4X4 ... (mini 1.8m, large 2.5m) New EAS Alarm System with wide detection to 2.5m *Features TX ... ensures high sensitivity, high detecting rate, and low false alarm rate.Advanced SMT processes, coupled with rigorous quality control, ... 168Hz, 178Hz, or 188Hz (optional)Alarm volume90db, 60db, 100db optional New EAS Alarm System with wide detection to 2.5m ...