Features: 1) Voice (outgoing sound) alternative by pushing UP and DOWN button to change voice levels (17 different masking levels) 2) LCD displays incoming call numbers and time (GT-542A only ) 3) Functions: last number redial, handsfree dialing, 3 emergency call, one-touch memories, 8 two-touch memories, volume control, flash, mute, pause, ringer on / off, music 4) Call screen: bypasses answering undesired phone calls and reduces harassment calls 5) Dimensions: 21 x 175 x 6mm 6) Weight: 900g 7) Single female can refuse unwanted dates or solicitation 8) Children who are left at home alone can ward off villains 9) Wives can spy on their husbands 10) Husbands can investigate their wives 11) People entertains friends and family members