Trusted Bluetooth Devices for Moto X

Planning on ordering a Moto X tomorrow. I'm wondering if my fitbit (which has Blutooth 4.0) can act as a trusted bluetooth device. Does Bluetooth 4.0 mean that the device (fitbit) has Bluetooth Low Energy? The website doesn't say much.

Are there any devices out there that can be a trusted bluetooth device? I might as well wait for the first smartwatch that comes out for the additional functionality.