The Zefon Bio-Pump Plus is the smallest and lightest portable battery powered IAQ sampling pump available. It provides the simplest and most convenient way to sample with Air-O-Cell and Via-Cell cassettes at a flow rate of 15LPM. Features: New 'Quick Sample' feature makes sampling a breeze. Extra Long Battery Life - Take 100 five minute samples on a single charge Very small size and weight - Over 40% less than the standard Zefon Bio-Pump Very quiet operation Programmable timer allows unattended operation Quick-charge battery charger included (approx 3 hours) Uses Air-O-Cell cassettes - the only industry proven and standardized sampling cassettes Uses Via-Cell cassettes - the only cassette style sampler offering both viable and non-viable analysis options Nothing to prepare or clean. Just place the cassette on the pump, set the time and go Each Pump comes complete with an Air-O-Cell flow indicator, quick charger, 10 FREE Air-O-Cell cassettes and a handy carrying case Specifications: Flow Rate: 15 LPM Housing: PC/ABS plastic Housing Color: Black Battery: Rechargeable Nickel Metal Hydride (NiMH) Sampler Size: 4.5” (w) x 2.75” (h) x 8” (d) inches Weight: 1.5lbs - TSI 4046 calibrator Not Included.