Features: The Mic Block plugs into your 3.5 mm audio jack making your devices think there is an external mic thus blocking all potential eavesdroppers. Mic Block provides high impression branding areas while also providing the ultimate privacy for your devices. Mic Block will fit the following devices: Computers, Laptops and Tablets. Includes standard backing card with instructions or custom designed cards (see pricing). Material: ABS. Colours: Black, White. Product Size: 19 x 16 x 7.0 mm. Branding Area: 17.2 x 5.8 mm. Standard Packaging: Standard Backing Card. Price includes: 4CP Digital Print & Custom Backing Card.