irobot Model Number J5/J6/J7/J8/J9+ i3/i4/i5/i6/i7/i8+i / j Series Compatible Model J5/J6/J7/J8/J9+ i3/i4/i5/i6/i7/i8+i / j Series Packaging and delivery Selling Units: Single item Single package size: 63X42X42 cm Single gross weight: 15.000 kg Show more ...
i3 = i1/i2/i4/i5 (with specific changes) i7 = i6/i8 (with specific changes) The same is true for the J models with advanced navigation: j7 = j5/j8 (with specific changes) The j9+ one ups the base config with the stronger motor, possibly from the previous generation s9. Confusing...