As of October 2014, the smallest Bluetooth headset available on the market is the Moto Hint, measuring barely larger than an average earhole. The Moto Hint is produced by Motorola and can be paired with an Android phone to access Google Now features.
When charged using the built-in charging apparatus, the Moto Hint can be used for up to 10 hours. The headset is also compatible with devices outside of the Motorola product portfolio, which allows it to be used with an iPhone to integrate with Siri or similar iOS devices. According to Motorola, the Moto Hint was designed over two years.