Thank you for viewing! Free shipping! No messages needed. Instant purchase welcome. ☆ Storage is a new 128GB SSD. ☆ Touch screen! Operation is also OK! ☆ 2-in-1. You can rotate the keyboard to make it a tablet. Tent mode is also possible. ☆ Office 2021 installed (license activated OK) ☆ Windows 11 Pro (license activated OK) ☆ Set up and ready to use immediately. Login password is not set. ※ Scratches and dirt present. ※ Scratches, dirt, and sticker residue on the top panel. ※ One screw for the back cover is stripped. If the back cover is removed, a 2.5-inch HDD can be installed. From what I can see through the gap, it looks like there is a mount. The SSD uses an m.2 slot. Battery can be used. The estimate is 4 hours and 19 minutes at 99%. This is just an estimate, and the battery is not guaranteed. PC specifications & accessories are as follows. Manufacturer: LENOVO Model (Product Name): 20c0s18m00 (ThinkPad S1 Yoga) CPU: Core i3-4030U 1.9GHz Storage: 128GB SSD Memory: 4GB OS: Windows 11 Pro Optical Drive: None LCD: 12.5 inches Accessories: AC adapter Size: 316.6 x 221 x 19.4mm Weight: 1.6kg Operation check Keyboard: ◯ Touchpad: ◯ Touch screen: ◯ USB: ◯ SD card: ◯ Wifi: ◯ Bluetooth: ◯ (Confirmed device recognition) Camera: ◯ Mini HDMI: Not confirmed Headphone jack: ◯ To prevent swapping, we cannot accept exchanges, returns, refunds, or cancellations. Please understand that this is a used item, so no claims or returns are accepted. Series Name... ThinkPad OS... Windows 11 Pro CPU... Intel Core i3 Memory... 4GB Graphics board type... Not installed Storage type... SSD Storage capacity... ~160GB Other features... With Office