ABS plastic device speaker with slow glow LED color light. Connects to your mobile device using wireless Wireless technology or through the 3.5mm audio cable provided. Push button to answer phone calls. Speak hands-free into built-in microphone. Aluminum case cylinder speaker with steel mesh cover and no-slip bottom. Connects to your mobile device using wireless Wireless technology or through the 3.5mm audio cable (not provided). Includes rechargeable Lithium-ion battery that charges through USB port (cable provided). Speak hands-free into built-in microphone . Also play MP3 files though a USB flash drive or TF card.