I bought this on Yahoo Shopping to prevent my cat from accidentally getting locked in a room, but I ended up buying something else and never used it, so I'm selling it. The bag has been opened! It cost 990 yen. **Features of the Automatic Door Stopper:** It's a common scene: a door slamming shut in the wind, or children slamming doors. In homes with small children or pets, this can lead to injuries or accidents, such as getting fingers caught in the door or being locked inside a room. This automatic door stopper requires no tools and can be installed even in rental properties. It's easy to operate and provides safety measures. * Prevents children and pets from getting their fingers caught or injured. * Prevents children and pets from being locked inside a room. * Allows for ventilation in the room. **※Precautions for Use** * Please install on a flat surface. * The adhesive is strong, so it may be difficult to remove once applied. * Please check the installation instructions before installing. * Do not use for purposes other than intended. **Name:** Automatic Door Stopper **Size:** Approximately 8.6 x 5.3 x 2.5-3.5cm **Materials:** ABS, TPR, 3M adhesive **Contents:** 1 piece **Country of Manufacture:** China