This circuit is used to alarm when you leave the door or window. _x000D_Shipping Time: _x000D_***Ship by register airmail with tracking no. (Need the receiver sign of receive when the item arrival): _x000D_Delivery time Almost of Asia Countries : 7-12 Working days* _x000D_Delivery time to USA : Approx 12-20 Working days* _x000D_Most of Europe Countries : Approx 21-28 Working days* * _x000D_The delivery time will depend on the processing at the customs in each country, _x000D_** Policy of Satisfaction on refund money: in case the item is not the same as product's description or damage during shipment, the buyer has to send the item back within 7 days after received and buyer respond on the shipping cost of return & The Item must be return in the same condition as it was when it sent to you. open everywhere such as the air-conditioned room, car door, etc.