Preventing lost items, theft of belongings, and preventing children from getting lost! Alerts you with an alarm sound and vibration when separated by 3-12m! For theft prevention of belongings For preventing items from being left behind For preventing children from getting lost For information terminals and laptops 【Operating Environment】 S: Approximately 3-5m L: Approximately 7-12m ※ Distance varies depending on the size of the room and the presence of buildings in the surrounding outdoor environment. 【Parent Unit】 External Dimensions: 62 (H) x 41 (W) x 16 (D) mm Weight: 46g (including batteries and key holder) Batteries: 2 x AAA alkaline batteries (Sold separately, but I will include the almost new ones in the photo) Battery Life: Approximately 1 month with 10 seconds of warning x 6 times per day, using 8 hours a day 【Child Unit】 External Dimensions: 35 (H) x 35.5 (W) x 8 (D) mm Weight: 10g (including battery and strap) Battery: 1 x CR2032 (test battery included) Battery Life: Approximately 2 months with 8 hours of use per day Used only twice due to a change in work environment. Everything in the photos is included.