Security Equipment Corp. Personal Alarm, Black (discontinued) options-998-24 In one set players use

In one set players use formulas to match the written notation of volume to diagrams labeled with dimensions

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Security Equipment Corp. Personal Alarm, Black (discontinued) options-998-24 In one set players useThis sleek, compact modern design keychain attaches to backpack, purse or keys for convenient, instant access, plus greater value with batteries included. The 110 dB dual siren alarm helps call for assistance in an emergency and helps deter attacker (audible up to 600 feet 185M away). Simple to use; pull metal chain from device to sound 110 dB alarm. Push pin back in to stop sound and use again. Safe for children, and a self defense option for any age.