100mm Tower ROGB Base Mount Buzzer Flash. range of product: Harmony XVC1 – product or component type: complete pre-wired monolithic tower light – beacon or indicator bank unit type: 4 illuminated units – sound signalling: buzzer – component name: XVC – light source: blue LED steady or flashing signalling, green LED steady or flashing signalling, orange LED steady or flashing signalling, red LED steady or flashing signalling – [Us] rated supply voltage: 24 V – supply circuit type: DC.