The wireless baby transmitter for your lisa RF signal system records, when your baby cries via the integrated microphone and thus triggers the alarm (flashes of light) of all receivers connected to your lisa signal system. The baby transmitter also has a paging button. An LED on the Humantechnik lisa baby transmitter is used for transmission detection and as a battery warning light.
Please note: a signal system for hearing impaired people consists of at least one transmitter and one receiver! All system components of the wireless lisa series are fully compatible with each other.