Monoprice's business hours can vary depending on the specific department or service you are referring to. Typically, customer service representatives are available to assist customers during standard business hours, which generally means Monday through Friday. Some departments may also have limited hours on weekends. To find the most accurate and up-to-date information regarding Monoprice's business hours, it is recommended to visit their website. The current web page should provide relevant details, including any holiday schedules or changes in hours, allowing customers to plan their inquiries accordingly. For specific services, those hours may differ, so checking the site is always a good idea.