Speak Easy! MAKE conversation PRIVATE! SECURE that Cell or PDA so that YOU will NOT be OVERHEARD! Disables Microphone AND Disables Speaker/Earpiece For Wireless Devices with 2.5mm Audio jacks... Blackberry, Cell phones, PDA's and similar. Bright RED, HIGHLY VISIBLE, for EASY VERIFICATION that it is in use. Comes with Snap Hook and credit-card-style Instruction Card. Easily Snaps to your Key Chain.