Ecovacs, a Chinese manufacturer of robotic cleaning devices, is offering discounts of up to 300 euros on three of its models ahead of Amazon's Prime Days, a major shopping event scheduled for October 6 and 7. The promotions, available on Amazon, will be active from September 29 to October 7. The models involved are the DEEBOT T90S Pro Omni, the DEEBOT X12S OmniCyclone, and the WINBOT W3 Omni. The DEEBOT T90S Pro Omni is being sold for 699 euros during the promotion, down from 799 euros. It features the OZMO ROLLER 3.0 system, which uses a 27 cm roller that continuously rinses with clean water using 32 pressure jets. It can operate at 4,000 Pa of pressure and 260 revolutions per minute, with the TruEdge 3.0 system allowing the roller to extend by 15 mm to follow walls and baseboards. The BLAST system provides suction of up to 40,000 Pa with an airflow of 16 liters per second. The ZeroTangle 4.0 technology reduces hair and fur entanglement around the brush. The OMNI station washes the mop and dirty water tank with hot water up to 75 °C and dries with hot air at 63 °C. The DEEBOT X12S OmniCyclone is being sold for 999 euros during the promotion, down from 1,299 euros. It also features the OZMO ROLLER 3.0 system and the FocusJet technology, which pre-sprays stubborn stains with a mixture of water and cleaning solution. It includes a BLAST 53 AW motor, PowerBoost Plus recharge, and an AIVI 3D 4.0 obstacle detection system. The PureCyclone 2.0 system allows for bagless cleaning, potentially avoiding the use of 25 bags over five years. The Care Kit version includes additional accessories such as two side brushes, a cylindrical brush, and three filter cartridges. The WINBOT W3 Omni is being sold for 549 euros during the promotion, down from 699 euros. It is designed for window cleaning and uses the Vortex Wash technology to clean its pads without manual washing. It features the WIN-SLAM 5.0 navigation system with a detection accuracy of 1 mm. The robot can clean windows with or without frames, starting from a minimum size of 30 x 40 cm. It uses a wide-angle spraying system combined with a wet pad to remove stains on glass surfaces. The device can be controlled via the ECOVACS HOME app with Bluetooth or Wi-Fi connectivity.