Lock And Key, Forgetting To Lock Prevention Item "ChecKEY"

[Features]
· Simple use by attaching the ChecKEY to your current key.
When the key is operated, the color of the display window changes to notify locking/unlocking.
In addition to the operation feeling and locking sound, it is now possible to check the status of lock opening and closing visually.
· ChecKEY is there to help build the habit of locking doors. Suitable for residential entrances, etc.