40mm Tower ROG Pole Buzzer Flash. range of product: Harmony XVC4 – product or component type: complete pre-wired monolithic tower light – beacon or indicator bank unit type: 3 illuminated units – sound signalling: buzzer – component name: XVC – device short name: XVC – light source: green LED steady or flashing, orange LED steady or flashing, red LED steady or flashing – supply circuit type: AC/DC.