1.New EAS Alarm System with wide detectionto 2.5m 2. ... .5m (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