The QOMO RF Wireless Interactive Tablet uses the same technology as long-range wireless networking providers, so you can use multiple devices without crossover interference. Access your computer from anywhere in your office to annotate files and images while you give presentations. The 16 programmable macro keys, intuitive express keys and built-in LCD status indicator panel make it easy to use. Pen uses one standard AAA battery (not included) and automatically shuts off to save battery life. The tablet battery is good for up to 25 hours of use.