Dual-robot HJ4042 is an advanced 4-motor model that can clean the pool floor, wall and waterline. Built-in “gyroscope” ensures that the robot runs in a straight line for efficient cleaning. It is specially designed for commercial swimming pools up to 1250m² (50m x 25m - Olympic size). It is equipped with 4 large-volume filter baskets that can be taken out and maintained easily. It is equipped with a convenient control box where users can choose 3 working cycles and 4 cleaning modes according to the level of debris in pools. HJ4042 can be connected to the smartphone via Bluetooth, and users can control on “Winny Link” app.