※Please be sure to read this. 4iiii folding stationary roller, with sensor, perfect for training. - Brand: 4iiii - Type: Stationary roller - Accessories: Sensor - Color: Black - Structure: Folding This is the "Fliiiight" smart trainer made by 4iiii. Unlike other manufacturers that physically apply resistance to the rear wheel, this system uses magnetic force. Because the wheels are suspended and there is no physical contact, it is "very quiet," and because it can be installed without removing the rear wheel, there is "almost no hassle before and after use." It also uses TYPE-C for operation, making it easy to handle. Includes a rear wheel axle and a speed sensor to attach to the spokes. You should be able to use it immediately by installing the 4iiii app. Please refer to the manufacturer's website for usage instructions, etc. Fliiiight Smart Trainer Price: 62,000 yen (excluding tax) Dimensions (with legs open): Length 552mm x Width 741mm x Height 450mm (565 x 470 x 110mm when stored) Weight: 7.9kg Compatible end: 130-150mm quick release Maximum simulated gradient: 7% I purchased this on this site, but I have decided to purchase a different smart trainer, so I am selling this one. I don't have a bike, so I haven't been able to confirm its operation, but I have confirmed that the power turns on and the connection to the app works normally. Thank you for looking.