It's okay, the motor is very strong, be careful, made for ventilation and if you have a width of opening will be less than the length of the chain, the motor will will is will I knocked out the extra links, it was very difficult! Made on conscience! And also when you order, immediately order a square installation box 86x86 for the switch! It came one and a half months before the apartment!
I did not notice that the motor is not wide. It turned out that there was nowhere to put it on my little framing. In addition, in the closed position, the drive chain should be fully drawn. T. E. You can not put the drive on the slope and push the window for its closure-the motor must stand in the plane of the window frame. Almost all installation options assume that the window opens outside. In general, the device is good and the delivery is fast enough, but I hoped that the installation on any window was thought out. In the photo, the motor is compared to the window (for scale).
All came, packed perfectly, delivered the courier) waited about 1-1.5 months in Kazan) immediately installed, works well) I hope, for a long time enough) took for the office, looks very cute) of the minuses: The remote need a battery for 500R, it would be great, if it was included)