CHANNEL AND VOLUME CONTROLLER MODEL LDA VCC-64. Up to 99 programmable channels and volume control (0-9). It is installed in the local zone and connected to the system via bus. It provides channel selection and volume control. Bus: RS-485 with a maximum communication distance of 1200m. 4-P terminal block. Auto-lock function. DIP channel selector. 2x8 LCD Display. Connection to SIME via STE-21 (up to 8VCC-64 units per STE-21). Dimensions:86x56x40mm. ABS enclosure.White color.Weight: 110g.