Bluetooth gadget showcase from CES 2016 (pictures)

This connected knit hat has Bluetooth speakers built-in. It offers up to 6 hours of continuous playback and a built-in mic for making phone calls.

A Bluetooth-only smart home hub.

A HomeKit compatible, Siri-enabled smart lightswitch.

Another HomeKit-focused smart home plug, this one with energy monitoring.

A Bluetooth smart home control button that's compatible with IFTTT, and smart LEDs from Philips and Lifx.

A wristband with Bluetooth earbuds built in. Sure.

A smart shirt that can measure heartrate, breathing rate, steps, cadence, calories burned and sleep.

On the smart bulb front, iLumi debuted a weather-resistant outdoor version of its color-changing Bluetooth bulb.

The new Kwikset Premis is a Bluetooth deadbolt that boasts compatibility with Apple HomeKit, the set of smart home protocols programmed into iOS devices. That means you'll be able to ask Siri to lock and unlock it.

Kwikset also showed off some new Kevo hardware -- a second-gen touch-to-enter deadbolt that's supposedly stronger against brute entries than before, and the Kevo Convert, which clamps over your existing deadbolt to add in smart compatibility with the Kevo platform.

A smart planter that monitors plant health via Bluetooth. Also has a water reservoir that waters your plants automatically.

It's a drone. It's a boat. Drone boat.

A pair of Bluetooth wireless headphones that can simulate 5.1 surround sound, released in September 2015.

Uses a scale and an app to guide you step-by-step through smoothie recipes.

A smart football with a built-in sensor for measuring distance, speed, spiral efficiency, and catch and drop detection.

A stylus compatible with your Android or iOS device that can write on any surface.

The rubber Roli keyboard.

The Veta app and connected case uses GPS and a variety of alerts to help you keep track of your epinephrine injector. It's available for preorder online for $59.