Bel-Art Scienceware 378620000 Hand Held Electronic Colony Counter

Mark colonies and enumerate them in a single step, with a clearly audible beep for confirmation. The lightweight hand held probe style colony counter comes with a 4-digit LED screen that displays total count. A convenient toggle switch permits you to count up or down to amend errors, or to reconfirm your observation by a backward count. Power source is a 3V battery. The versatile, extended use felt-tip marker marks on plastic or glass; markings oil and water resistant, but can be erased with ethanol. Comes with both red and black markers.

• Faster more accurate counting
• 4-digit display
• Counts up or down
• Perfect for plastic and glass surfaces