This Signature Series Telephone Transmitter connects easily to the jack of any standard analog phone line. For users with hearing loss, the transmitter sends a signal to a Silent Call Signature Series receiver when the telephone/TTY/VCO rings. This system has a range of up to 700 feet. System comes with 2 AA batteries and a dual phone jack.
Five year limited warranty.
Product Manual Click Here For The Signature Series Telephone Transmitter Instructions