The PenFriend Voice Labeling System consists of a digital pen and labels containing barcodes that can be "read" by the pen, which has built-in memory and a microphone/speaker system. This allows those with visual and hearing impairment to affix a self-adhesive label then scan it with the pen and make an audio recording of what that particular label represents. Touch with the pen any recorded label, and the message will be played back. There's no limit to the length of a message. The system, which requires no computer, includes 127 labels, three magnetic badges (to use on metal), 4GB of internal memory, a neck lanyard, sticker management software, and two AAA batteries.