The WBM Smart Wireless Door Sensor security system is very accurate and reliable with the latest technology of now days for the convenience of our trust worthy customers. The smart home door sensor has very easy installation with not a single tool requirement. No wiring required. A critical part of any home security system is knowing if your exterior doors are open or not, and you can configure your doors to be security devices at night, and simple door monitors during the day. Just click up your sensors with one of our smart locks, so you know the door is not only closed but also locked. The WBM Smart Wireless Door Sensor has five different levels, 55 different ringtones and Led Flash as well. You can set your own ring according to your mood. You can also connect the entire household to all smart home products from their phones. Moreover You will also receive instant mobile alerts when doors and windows open or close in your smart. Customer satisfaction is our first priority and we always stand behind our all products that is why we give 30 day money back guarantee as well. So think less and take the google home Door sensor for your safety and protection.