The Logitech X100 (available on Amazon, $22.99) portable Bluetooth speaker is a small but reliable speaker with a few extra features for a low price. For starters, the X100 connects to devices via Bluetooth and has built-in volume control buttons. It also comes with both a wrist cord and a backpack cord to bring anywhere. One advantage the X100 has over other speakers is the built-in microphone, allowing users to answer phone calls without ever having to disconnect from the speaker to talk. It has a rechargeable five hour battery that allows for continuous use for a good amount of time.