suitable for home office, high quality sound enjoy wonderful music with the kids at home Different Materials to Give Different Sound Effect Feel different rhythm in different materials Metal: Strong bass sound Card: The clarity of the reduced sound and it feels like vinyldisc Glass: Clear and transparent sound Hollow Wall: Good spacious sound performance Colour:Black Material:metal Size:85x85x80mm Package Contents: 1* speaker 1* AUX cable 1* USB line 1* manual Kindly Note: Please use a Bluetooth device to connect the speakers, adjust the volume or up and down by touching the buttons! When not in Bluetooth mode, please use the Line Cable to turn on the device, adjust the volume or up and down through the device! Only the above package content, other products are not included. Note: Light shooting and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.