Name: Dular（double pull alarm device） Product description: This product is mainly to solve the problem that the two pull heads can be opened in any position. This product can be alarm when someone pull the zipper, pulling the zipper by users themselves wouldn’t trigger the alarm, zipper unlock notice, and other protective functions. We put controller, sensors, rechargeable batteries, buzzer, battery protection and other components concentrated in a slider, to achieve alarm minimized and the sense of technology to bring users a high quality experience.