The set includes minimalist elevator call panels for modern public interiors: office buildings, residential common areas, hotels and business centers from the manufacturer KONE.
https://distributors.kone.com/ru/tools-downloads/ 

The set includes built-in and surface-mounted models in graphite and chrome finishes:
- SKL 186 (with shadow seam)
- KSL D20
- KSL 730 (recessed and surface-mounted)
- KSL D40 (simplex/duplex)
- KDS 330 (simplex/duplex/touchless)

Made in Corona 9.
The model uses CoronaLegacyMtl materials, which may not display correctly in very old versions of the engine.
For Corona render, it is recommended to install version no lower than 1.5, since the glossiness of materials is configured taking PBR into account.