There are two connectors on the MOTOACTV: a micro USB port and a 3.5 millimeter headphone jack. The micro USB port lets you connect the MOTOACTV to a computer for the initial setup of the device, including loading music from your computer to your MOTOACTV. It's also is the port through which you charge the MOTOACTV's battery. The headphone jack is just what it sounds like -- a place to plug in a pair of headphones.
Using Bluetooth or ANT, you can pair the MOTOACTV with other devices. If you own an Android smartphone, you can use Bluetooth to create a connection between your phone and MOTOACTV. Incoming calls and text messages will display on your MOTOACTV's screen. If you have a headset connected to the MOTOACTV you can even accept calls through the device, just the feature for your average Dick Tracy on the run.
You can also pair up special sensors designed to keep track of your activities. This can include a heart monitor, which measures how fast your heart beats, or a GARMIN Foot Pod, which tracks how far and fast you travel as well as the length of your stride. The choices aren't unlimited -- Motorola has partnered with a few companies to provide support for specific sensors.