Module set compatible with iRobot Roomba j7 j9. - Model Name: Compatible with iRobot Roomba j7 j9 - Part Type: Module Set - Accessories: Instruction manual - Condition: New, Unused, Opened Thank you for viewing. I am selling this because I mistakenly purchased the "Roomba j7+" without carefully reading the description on the online shopping site, even though I use the Roomba j7+ combo. I opened the clear plastic bag during installation, but it is unused. Please check the images. I have quoted the compatible models from the purchase site. Compatible models: e5 / i2 / i2+ / i3 / i3+ / i5 / i5+ / i7 / i7+ / j7 / j7+ (Can be replaced with a Phillips head screwdriver) * Not compatible with Roomba Combo. Errors 1, 3, operational errors 5, 7, 10, and 13 may be improved. (If not improved, the main board may be defective) This is my first time selling, so my responses may be slow, but thank you for your understanding.