Hand-held colony counter battery-operated + pen, stand, battery Contains LITHIUM-ION CELLS. Does not require labeling according to SV 188, ADR. Battery-operated pen for counting and marking colonies. Acoustic or visual signal registers counting process Count up/down function Locking key to switch off counting function For counting up to 32 plates With totalling function Delivery incl. pen, stand and battery (3 V, Type: CR 1220).