Please be aware that this is a defective item. Discounts available for combined purchases with other items. Price reductions: October 29th: 2800 November 5th: 2700 November 13th: 2600 November 23rd: 2500 November 29th: 2400 December 20th: 2300 December 27th: 2200 January 2nd: 2100 This is a Waterpik. I used it until mid-August 2025, but I'm selling it because I bought a new one. Although it's defective, it was still usable. Here's a description of the defects: ① The rubber gasket at the bottom of the blue water reservoir has deteriorated, and water drips out if the reservoir is removed from the main unit. As a countermeasure, I either poured water into the reservoir while it was still attached to the main unit, or I held the gasket in place while attaching the reservoir to the main unit. ② The cover's connection part is detached. I left it off because it seemed like it would break if I tried to attach it. I didn't use the lid, so it wasn't a problem for me personally. ③ The rubber connecting the handle for attaching the tips to the main unit has deteriorated and cracked, so I replaced it with an aftermarket part. I replaced the entire part, including the screw-on section on the back. The plastic quality feels slightly cheap. I've been using it for about two years since the replacement, and there have been no problems with its use. Regarding the tips, two of the jet tips are used. The other four tips: Pik Pocket (for pinpoint use) tip, Tongue Cleaner tip, Orthodontic tip, and Plaque Seeker tip are probably unused. Waterpik Ultra WP-100J Brand: Waterpik