12 channel pipettes are ideally suited to the complex demands of research and higher throughput testing environments. An intuitive user interface allows easy set-up and use of liquid handling functions for pipetting, mixing, multiple dispensing, serial dilutions and reverse pipetting. Tip handling is also fast and easy with our unique tip acquisition system that provides the user with an audible "click" to indicate all tips have been securely fitted. Tip release is just as quick and with the gentle push of a button. Left-handed model. These models require a power supply unit (included) to recharge the pipette's battery. New for 2010: Our Ovation 12 channel models have been updated for even easier tip acquisition, lower tip insertion forces, and improved line-of-sight for tipping. Accuracy: +/-1.0 percent at 20 microliter, +/-1.5 percent at 10 microliter and +/-3.0 percent at 2 microliter. Precision: 0.40 percent at 20 microliter, 0.80 percent at 10 microliter and 1.80 percent at 2 microliter.