NEC mobile router Speed WiFi 5G X12 [NAR03], SIM-free. Made in China raises concerns about data security, but this is a reliable Japanese manufacturer. It's in beautiful condition, having been used only a few times. Operation has been confirmed. Many used ones have scratches on the corners, but I think this one is in excellent condition. It's so clean that the ceiling reflects clearly in the photos. I checked the battery life, and it hasn't changed from when it was new. I think it lasts a good amount of time. Many devices have battery degradation from being constantly connected to a cradle, so this condition is valuable. You can use it with Rakuten Mobile, allowing you to have unlimited Wi-Fi at a low cost. I use the same model with a Rakuten Mobile prepaid SIM and get 100GB per month for about 2300 yen. You can enjoy 5G even at a low price, which is comfortable. The 5G area has expanded considerably in the past year, which is very good. I can share more information if you'd like. There is also a manual. I will include it if you wish. I will ship via Nekopos, so I won't send the box, but I can fold it and send it at no extra charge if you'd like. I will include a new dedicated case. The inside is microfiber, so it keeps the device clean just by being in the case. No price reduction is possible. The main features of Speed Wi-Fi 5G X12 [NAR03] are as follows: High-speed communication: Supports 5G and Wi-Fi 6, enabling fast and stable wireless communication. Achieves a maximum download speed of 3.9Gbps. The first WiMAX mobile router to support SA 5G. Security: Supports the latest Wi-Fi security standard WPA3, providing stronger security measures. Convenience: Lightweight and compact design for easy portability. Equipped with a 4000mAh battery for long continuous communication. Supports Wi-Fi connection settings via QR code. By using a separately sold dedicated cradle, wired connection and more stable 5G communication are possible. Other: You can easily manage the device and check data usage with the dedicated smartphone app.