The points to check before selecting a motorised system: 1. Screen. Several projection screen formats exist: 3:4, 9:16 and others. The screen format must be considered before deciding on which motorised system is best. 2. Quiet motorised systems. To take full advantage of the acoustic comfort provided by the Sonesse® solutions, we recommend you use the “Designed for Silence” accessories. 3. Available power supplies. A power supply must be available near the motor. These Somfy products must be installed by a professional.