IDRescue is really useful APP when you want to check how to use "YAMAHA Smart KEY System". And even if you lose the key, this APP will instruct how to use "Emergency Mode". This APP has the following functions. 1. How to use smart key system. 2. Identification number (KeyID) registration. 3. How to use "Emergency Mode". 4. Search for shop (Link to Yamaha motor WEB Site).