There is no problem, If you have Door lock D-key. It doesn't need to brings keys so that no worries with lost keys. Have you worried about keep it indefinite because the car key? It doesn't matter with all your package are inside of your car and door got locked. It solve the problem about when you swimming or keep trublesome car keys for outdoor activities such as camping.
Make it free yourself from the car keys to easy setting up. It can be lock the door and open the door without any normal key. The item "Door Touch Digital Smart Key Lock Unlock AUX Relay Kit Keyless For TOYOTA" is in sale since Tuesday, April 26, 2016. This item is in the category "eBay Motors\Parts & Accessories\Car & Truck Parts\Interior\Other".
The seller is "finedayshop" and is located in Fast Shipping. This item can be shipped worldwide.