This Harmony XB5, hour counter has 5 display digits and is supplied with 12V to 24V AC/DC.This hour counter provides a visual indicator on the number of hours operated of your installation.It is easily installed into standard 22mm diameter cut-outs.It is impact resistant, dust resistant, water resistant and vibration resistant thanks to its IP66, making it ideal for operation in harsh environments.Its wide range of operating temperatures from -25°C to 70°C allows versatility in usage of product.