The Xtreme Helios True Wireless Bluetooth Speakers are designed for an immersive sound experience. The completely wireless stereo speaker has color changing LED ring accents that helps enhance and vitalize your music experience. The built-in microphone makes it easy to answer calls, while the built-in audio controls make it easy to change songs or to turn the speaker on and off. The speaker plays music wirelessly via Bluetooth or through a built-in TF card slot for MP3’s.