Sound programmable beacon-informer for blind people, model: Istok-Inva

Sound programmable beacon-informer for blind people "Istok-Inva" is designed to facilitate orientation of visually impaired and blind people in space. It is installed above the entrance group of pavilions under street crossings and lobbies of metro and MCC stations.
The device plays back a sound file from the internal memory using a speaker. The playback volume is automatically adjusted depending on the ambient noise, the level of which is assessed by the device using the built-in microphone. The sound file in the internal memory can be changed by copying a new file from a USB memory stick.
Current consumption2A
Speaker output power 10W
Number of volume levels8
Pause duration adjustment limits3 - 60 s
Capacity of internal memory of the deviceNot less than 128MB
Screen size96 x 64 dots
Maximum sound pressure level 90 dB
Dimensions of the device 120x120x60 mm
Weight of the device is not more than 1000 g
Time...