iMoastsky Child Alarm Bracelet Anti Lost Wristband Anti Lost Alarm Safety Security For Baby Pet Purse Adjustable 0-25 meters to search the lost kid Anti-lost presettable alert distance with auto vibration and beeps With key-lock function to the wristband Used in public places such as park, garden, square, shopping mall, street, etc. User can freely set the safe distance within 0-25m, vary with the protected objects.