1.New EAS Alarm System with wide detectionto 2.5m 2.4X4 ... 2.5m (mini 1.8m, large 2.5m) New EAS Alarm System with wide detection to 2.5m *Features TX adopts ... phase-lock and noise sliding reduction ensures the system high detecting rate.LED grading lights makes the ... Scan rate158Hz, 168Hz, 178Hz, or 188Hz (optional)Alarm volume90db, 60db, 100db optional New EAS Alarm System with wide detection to 2.5m