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.