Kit includes everything you need: 3-channel laser diode particle counter with internal pump. 0.3um-5.0um Good to ISO 4. NIST traceable. Computer download software and USB cable, Isokinetic sampling Probe. Calibration filters, rechargeable batteries (4.5 hour constant use life), charger and AC adapter. Lockable hardened carrying cases for all components. Huge 8 line color display. Internal HEPA. Retains 8,000 sample records.