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 long time. Many devices have battery degradation because they are left connected to the cradle, so this condition is valuable. You can also use it with Rakuten Mobile, allowing you to have unlimited Wi-Fi for a low price. I use the same model with a Rakuten Mobile prepaid SIM and use 100GB per month for about 2300 yen. You can enjoy 5G even at a low price, so it's comfortable. The 5G area has expanded considerably in the past year, which is very good. I will share information with those who are interested. There is also a manual. I will include it if you wish. I will ship it via Nekopos, so I will not ship the box, but I will fold it if you want it, at no extra charge. I will include a new dedicated case. The inside is microfiber, so it stays clean just by being in the case. No price reduction. 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. It is the first WiMAX mobile router to support SA 5G. Security: Supports the latest Wi-Fi security standard WPA3, enabling stronger security measures. Convenience: Lightweight and compact design for easy portability. Equipped with a 4000mAh battery for long hours of continuous communication. Supports Wi-Fi connection settings via QR code. By using the optional 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.