Isonas PAC-21-50-2Y 

https://www.imotion.live/shop/pac-21-50-2y-isonas-pac-21-50-2y-10928 https://www.imotion.live/web/image/product.template/10928/image_1920?unique=4d9b2f8

Pure Access Cloud, 21 to 50 door license, basic access control