This is a BMW SIM READER. 84105A48C11 According to the BMW website, this product allows you to create a Wi-Fi hotspot in your car by inserting a Docomo or KDDI SIM card! Retail price: 15,000 yen! Opened for photography, but it's brand new and unused! There are complex compatibility requirements, so please purchase only if you are certain it will work with your car! Also, as mentioned earlier, a separate SIM card is required, so please be aware of that. The following is an excerpt from the manufacturer's website. The BMW SIM Reader is a product for using Personal eSIM. It is a small, portable, battery-powered device that connects to the car's infotainment system via Bluetooth. (Package) BMW SIM Reader, BMW logo keychain, Opening tool, Quick Start Guide (Technical Data) Dimensions: 63 x 35 x 19 mm Weight: 34g (including battery) Wireless Interface: Bluetooth 4.2 LE Operating Temperature: -30 to +85 °C Battery: ER14250, Lithium, 3.6 V, 1200 mAh (Notes) The BMW SIM Reader for Personal eSIM can only be used in combination with SA 6PA. Not all vehicles equipped with SA 6PA are eligible to use the BMW SIM Reader. There are exclusions related to the vehicle's manufacturing date and combinations with some of the higher-end SA of the driving assistance system.