Unique wireless 4.2 technology makes a steady and unbreakable connection with all bluetooth devices from up to 33 feet away. 3.5 mm audio cable (included) can be used to play audio from desktop computers, TVs, MP3 players. High capacity rechargeable battery for up to 6 hours of playtime at 2/3 volume on a full charge. Keep the music pumping all day long with this mini speaker. At only 8oz. This feather light outdoor portable mini speaker is perfect for and outdoor adventure. It can easily be slipped into your backpack for music on the go, bluetooth speakers are built in microphone for Hands-free calling. It also support FM radio playing, insert the USB charging cable to obtain a better FM signal. 1 3/8"L x 1 3/8"W x 1 15/16"H