The mouse works through a radio frequency (RF) transmitter that can be connect to a USB port on either a laptop or a desktop PC. The unit slides into the bottom of the mouse turning if off to avoid battery waste. It requires only one AA battery that goes into the mouse body. Thank God we didn’t read the manual (who does it, anyway?) prior to put the device through test, as the diagram misleads the user when installing the battery. The negative end should go first – and not the positive end as the manual suggests. It’s not the end of the world but still it shouldn’t have happened.

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Figure 2: the transmitter slide.

The bottom of the mouse houses the button to open the battery compartment and also the on/off switch. The V220 can be manually turned off if the user is about to spend a lot of time not using the mouse without having to reinsert the RF device. You can leave it plugged on the laptop and turn off the mouse to spare the AA battery. A LED just bellow the scroll wheel goes from green to red to let the user know if the battery is either good or low. The wheel in itself is made from rugged rubber and allows for a smooth vertical and horizontal scroll.

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Figure 3: The battery compartment.