The Ulyser is a battery-powered receiver for acoustic signals with a frequency of 5 to 50 kHz. The Ulyser receives the acoustic signals via an integrated microphone. The received signals are optically displayed via a blinking symbol and acoustically via an integrated loudspeaker.

Functional tests of ULD’s/LF-ULD’s can be carried out by means of the Ulyser. The Ulyser measures the battery voltage and reads out data of the ULD. This data can be analysed with the included software.