Many laptops and wireless keyboards either don't have any indicator for Num Lock or have it located in an inconvenient or hidden place, under a hand for example. So knowing the actual state of Num Lock, especially after accidental key pressing is a huge problem!
Num Lock Indicator software offers two Num Lock state indicators: Tray Icon and On-Screen Floating Text. Notifications by sound are also available. Moreover, sound alerts can be different for On and Off states.
The product is distributed on the Try Before You Buy model with 30-day trial period. The license costs $5.95 per computer or user. There is a volume discount.