Home Slickdeals Roborock S4 Max Wi-Fi Robot Vacuum w/ Lidar Navigation $309.99 at Amazon... Slickdeals Roborock S4 Max Wi-Fi Robot Vacuum w/ Lidar Navigation $309.99 at Amazon & Walmart By ARCOM - 17 June 2021 80 0 SHARE Facebook Twitter Go to the deal page: Roborock S4 Max Wi-Fi Robot Vacuum w/ Lidar Navigation $309.99 at Amazon & Walmart