The Custom Mini Toolbox Bluetooth Speaker by US General is a portable speaker system. It is compatible with both Apple and Android devices, featuring Bluetooth connectivity for easy audio connectivity. The speaker consists of two 4" speakers with chrome knobs to control the treble, bass, and volume. It has a convenient On/Off switch in the front left corner of the bottom drawer. With its unique design and convenient portability, this mini toolbox Bluetooth speaker is a must-have for anyone looking to enjoy music on-the-go.