<ul><li>Easy to install and use - Swimming pool/door/gate alarm with remote control. </li><li> </li><li>Multifunction - Magnetic Contact Door Alarm/Door Bell/Swimming Pool Door Alarm/Refrigerator Door Alarm/Door Break Alarm</ li><li> <br/ > </li><li>Remote synchronization - Multiple remote sensors can be synchronized. </li><li> </li><li>Magnetic Shutters - Alarms when the elderly and children with dementia open windows or interior doors. </li><li> </li><li>Avoid ANY accidents - Keep children out of closets, above ground pools, supervised walks, sleepers, the elderly. Food : 2 AAA batteries (not included) </li><li> <ul></ul></li></ul>Note: The data is all measured manually, please allow 1-3 error cm, due to the difference in light and display, there will be a certain color difference, the actual object received shall prevail. Note: Due to the light and screen setting difference, the item's color may be slightly different from the pictures. Please allow slight dimension difference due to different manual measurement.