This kit includes: You will also need a Micro USB Cable (not included) to load the sounds to your MP3 board. Alternatively, you can play them directly from a microSD card (not included) inserted into the board. If your computer doesn't have a MicroSD card reader/writer then this inexpensive microSD USB Reader and Writer will do. Features of The FN-BC04-TB Technical Parameters Connections K1, K2, K3 and K4 are Normally Open (N.O.) manual buttons. TX port and RX port are used to connect with a MCU, through which serial commands are sent to control the module. Features of the speaker Magnesium/aluminum alloy concave cones and square frames are the distinguishing features of the BS Series. HiVi B2S 2" drivers are capable of covering a wide portion of the audio spectrum, and are easy to install without the need for cutting complicated driver recesses. Magnetically shielded design allows use in center channel and other multimedia applications. Stamped steel frame and rubber surround. Speaker Product Specifications Nominal Diameter: 2" Power Handling (RMS): 10 Watts Power Handling (max): 20 Watts Impedance: 8 ohms Frequency Response: 150 to 15,000 Hz Sensitivity: 78 dB 2.83V/1m Voice Coil Diameter: 1" Sensitivity: 78 dB 2.83V/1m Mounting Information Overall Outside Diameter: 2.13" Baffle Cutout Diameter: 1.875" Depth: 1.25" # Mounting Holes: 4All that is needed is a small screwdriver to attach the wires to the MP3 board. Add 8 x AA batteries and you are good to go!