This is our in house printed chassis ..That supports our crystal module crystal chamber. Our chamber is designed to fit multiple applications and is customiazable. You get the chassis the speaker pod and the upper granade section and upper crystal chamber plus the clap switch holder . It is designed to support our single pixel PCBS and a 18650 battery. We have the options for tcss connectors or Shtok. Crystals not included .Real Copper Crystal Chamber Top is optional..