The Motorola Moto Hint is a sleek wireless earbud that allows you to control your smartphone using only your voice. Using an infrared sensor, the Moto Hint detects when it is in your ear and will automatically turn on. Once on, the Moto Hint uses Bluetooth technology to give you full access and control over your Moto X smartphone through using voice commands. The Moto Hint is currently retailing for $149.99.