60mm Tower RO Pole Buzzer Flash. range of product: Harmony XVC6 – product or component type: complete pre-wired monolithic tower light – beacon or indicator bank unit type: 2 illuminated units – sound signalling: buzzer – component name: XVC – light source: orange LED steady or flashing, red LED steady or flashing – [Us] rated supply voltage: 24 V – supply circuit type: AC/DC.