We use parts that have been confirmed to be safe and reliable and after assembling the parts we conduct a bench test to confirm normal operation before finalizing the product.Since this is a private sale please understand the instructions and precautions for using the device and use it at your own risk. If it does not work properly please contact us at the email address listed in the manual. We will issue a refund or exchange as soon as we can confirm this with photos or videos.Never open the protective tape covering the main body of the product. (To prevent wiring trouble)If the protective tape on the device is opened we will not be able to provide any refund or support.Thank you for your understanding.This product is a specialized device that simply opens and closes the roof with a one-touch button remote control just like the genuine roof switch.Therefore there is no engine start function or automatic alarm release function and the key is placed in the cylinder and used with the ON position.The purpose of this device is to check the operation of the roof near the car. It is especially useful for external troubleshooting when roof operation is not working properly.Also if you fix the remote control to a console in your car it can be used as a one-touch switch which is very convenient.In general roof operation uses multiple motors to raise and lower the heavy roof which consumes a lot of battery power and if the vehicle is used repeatedly without the engine running the battery may run down. Therefore we strongly recommend (including other manufacturers) that you use the product with the engine running.The device itself costs approximately $85.If you want a device with remote start and security features please buy a device like VIPER total $1000or more.The purchaser agrees to assume all responsibility for the installation and use of the product.Therefore please download and read user manual carefully before installing and using the product.Thank you very much for your understanding.Buyeeis the most trusted company offering secure payments and fast reliable and affordable international shipping for Japanese products.Shipping from me to the Buyee warehouse in Japan is free.The buyer then pays the international shipping charges to Buyee.For example shipping from Japan to all of the United States is about $25.Excluding shipping the minimum brokerage fee to Buyee is less than $3.Thank you.