1.RF EAS alarm system SCC3833 2.4X4 soft label: 1.5m Hard ... , midi 1.8m, large 2.0m) 3.Elegant looking RF EAS alarm system SCC3833 *Features TX adopts four frequencies modulation technology ... , 178Hz, or 188Hz (optional)Alarm volume90db, 60db, 100db optional RF EAS alarm system SCC3833