SMART DESIGN : The alarm and magnetic stripe are separated more than 0.39inch(10mm), it keeps going off until you close door(make them connection) or turn it off(switch to the button "OFF"). | Battery for power supply can be used for more than one year(3 * LR44 batteries included per alarm )(NOTE: 1. Take out the plastic insulation sheet in battery compartment before use, 2. The small triangle on the side of the strip magnet is aligned with the small triangle on the side of the alarm with a spacing of less than 0.39inch(10mm), 3. Your frame and window or door must be flush, make these two components must be installed very flush with one another) | EASY INSTALLATION :Wipe the flat surface, peel off sticker, mount the alarm on door and magnetic stripe on door frame. | Big LOUD ALARM :door window sensors loud enough to detects entry, prevent kids and babies going out the house, protecting your home office, garage, dorm room, or apartment whether you are in or out. You can definitely hear it from another room to alert you. No worry the young children could mess with it, just have it up high where they can't reach it. Work on sliding doors, windows, drawer, fridge. | Size: 2.52" x 1.67" x 0.66, no much space needed to install. It has 4 adjustable settings (on/off). Package include 4 door alarm.

★【17 Modes】Steady on single color,Combination,Breath changes,RGB multicolor cup pad with 7colors(white, red, blue, green, yellow, purple, ice blue) for you to choose,LED coaster diameter: 2.7 inches,Basically suitable for all car models. | ★【Design Principle】 Developed according to night and vibration mode. After it is turned on, the light-emitting coaster has the function of automatically turning on and off. It will automatically light up in a dark environment and vibration, and after 10 seconds of static, it will automatically turn off without manually turning off the switch light source. | ★【How to Use】 When using, please press and hold for 5 seconds to turn the product on or off. Press and hold for 3 seconds to switch the mode. There are multiple modes, such as constant light, flashing and breathing light. Note: Please remove the surface protection film before use, ordinary USB charging ports can be used, and more detailed methods of use can refer to zhe 2 pictures. | ★【Novelty Products】 Our LED coasters can not only provide light sources in the car, but also create a comfortable atmosphere and enhance the sense of luxury in the car. It is a very fashionable and popular indoor lighting at present. It is a gift to friends, lovers, parents, brothers, Very cool gifts for sisters, colleagues, etc. | ★【Buy now】 This cool LED glowing coaster,Our products provide 30-day worry-free service, if you don’t understand the instructions, please contact us in time, we will provide you with better service