A cost effective and accurate way to count colonies of bacteria or other microorganisms grown on an agar plate. This simple to operate device marks, counts, and gives an audible and visual alert each time a count is registered. The lightweight, pen-style design reduces the likelihood of error, combining all aspects of counting into one motion.

• Backlit display for easy viewing in low light conditions
• Audible alert can be turned off if desired
• Counting function can be locked to prevent error during breaks between counting
• Long life, red and black felt-tip markers (included) work on plastic or glass and are oil and water resistant; ink is removable with ethyl alcohol
• Includes 3V lithium battery and protective storage case