Kit includes everything you need: 3 channel laser diode particle counter w/internal pump. 0.3um- 5.0um Good to ISO 4. NIST traceable. Computer download software and USB cable Isokinetic Probe. Calibration Filters Rechargeable batteries (4.5 hour constant use life), charger and AC adapter. Lockable Hardened Carrying case for all components. Huge 8 Line COLOR display. Internal HEPA. Retains 8,000 sample records.