Garmin 830. The main unit is in good condition with no scratches or stains. The data has also been initialized. The setup is surprisingly easy, even for an overseas product. Accessories are as shown in the photos. Includes cadence sensor, speed sensor, and heart rate sensor. The heart rate sensor band has some fraying. (Please note that the band is a consumable item.) If you are concerned, please prepare a new one. They are sold on Amazon, etc. The 10 series is too big, and the 5 series is not enough, so the 8 series is recommended. It's offered at a low price, so please take advantage of it! Regarding the condition of the product and its use, No claims and no returns are accepted. Self-introduction: Non-smoker, no pets. Due to house dust allergies, I pay more attention to cleanliness in cleaning and laundry than the average person. Thank you. ① This product is a used item. Please be aware of this. ② I am not a business person, but just an amateur. I try to take care of maintenance and inspection, but there may be oversights, so please understand. ③ To avoid trouble, I cannot accept returns or refunds. Regarding packaging materials, I would like to reuse and recycle them to protect the global environment. Thank you for your understanding of the above three points.