Tera Grand Premium Bluetooth Wireless Speaker with Microphone - Retail Packaging - Black Bluetooth 2.1 + EDR standard, transferring distance over 10 meters (32 Feet), Bluetooth hands free function, answer incoming calls easily Support MP3/MP4 player, computer, laptop, with any 3.5mm audio device Power: built in Li-Ion battery, USB charging Loudspeaker: 4 Ohm, 3W, Frequency range: 170-15KHz With changing LED color light