For under $50, you can purchase this lie detecting device. It also makes a groovy looking bracelet.
The Truth Wristband works by using a person's galvanic response to a query. If the person is determined to be lying by the machine, it will go from blue to red.
Implications - This lie-detecting jewelry uses the tactic of emotional appeal to gain attention from consumers. Using the power of sentiment to attract customers is a great way to sell a product as this creates a bond with buyers that will last.