The CA10 is a simple but efficient multiroom system, it manages up to 12 zones, 4 audio in, to be wired starting from 3 main lines and then parallel connections. Bus IR for sources control and zone settings, video interfaceable (with CA3MKII via IR); it’s composed of GIOVE CA10 controller and GIOVE RC10 remote controls (tones regulation, volume adjustment, 4 audio in, 15+15W...) The CA20_CA21 is a technologically advanced multiroom system, it manages up to 32 zones (view details), it integrates many functions for IR codes managing, recallable presets (scenes), and communication ports for interfacing with most domotic systems (KNX, Vimar, Bticino, etc..), video interfaceable (with CA3MKII via 485); it’s composed of GIOVE CA20_CA21 and GIOVE RC20 remote controls (equipped with integrated FM Tuner, equalizer, loudness, tones regulation, volume regulation, audio in, pre-out, 25+25W...)