If you are a PMS user, the sync time between your PMS and Rentals United depends on the PMS you are using. In the Help Desk in 'Get started with PMS' you can find more information about your specific PMS.
The price/rate sync between Rentals United and the sales channels, depends on the channel you are connected to. For the HRSes (Booking.com, Expedia, Agoda and Ostrovok) the price sync is instant but there can sometimes be a bit of a delay due to high traffic
To get more information about specific channels, please see 'Sales channels' in Help desk in your Rentals United account.