The TTR-929T is an upgraded model TTR-929. A tone indexing feature has been added to the base model. A tone indexer records a beep sound on the tape and is used to locate sections of the recording while searching in Cue or Review mode. Includes the AC adapter and cassette instructions.

Since 1984 IRTI has engineered and modified tape players for nls 4-track talking books. As an authorized Sony dealer, IRTI was the first to modify a Sony tape player to play the nls format for talking books on tape. IRTI's 2000 sq. Foot product floor includes, hardware and software engineers, skilled technicians, test equipment, surface mount rework equipment, and quality assurance processes producing the most reliable modified tape players in the industry. IRTI repairs and supports every product it manufactures including tape players, custom turnkey computer solutions, and is the national service and tech support center for Plextor Daisy CD players and recorders and provides service and technical support recording for the blind and dyslexic rfb&d and their members.