can fill 25 ml pipet in under 4 seconds safety valve and hydrophobic filters provide double protection against fluid penetration two different speed modes high & low along with gravity drain the pump speed can also be fine-tuned by varying finger pressure on operating knobs for better control of speed cadmium-free environment-friendly NiMH batteries intelligent charger prevents over-charging / heating of batteries low battery indicator, power 2 x 1.2 V / 1000 mAh battery service life: 8 hours continuous use battery charging time: 2 3 hours volumetric range: plastic or glass pipets from 0.1 ml to 100 ml