The software, named "Cerebral Palsy to Joy (CP2Joy)", is the first human-computer interface for severely disabled people in Hong Kong. It will enable those with severe disabilities to use the internet on their own, thereby reducing the digital divide. The programme needs only a joystick – that is frequently equipped on most modern wheelchairs – and the built-in microphone of a personal computer. It requires much less physical movement to operate when compared to a traditional mouse and keyboard, making it ideal for use by a disabled person. When building the software, Sunny deliberately designed a "rolling character interface" which enables a user to quickly pick alphabets by applying a simple pre-recorded voice command (for example, pronouncing the sound "uh"). A user can also uses voice commands to represent a mouse action such as "double click", "move the cursor" or "move the cursor to a designated mark on a computer screen". The design enables the user to "type" accurately and efficiently with minimal motion.