Whether you use the Alex Mini Metal Sensor Spy Toy to examine a crime scene or to find some precious treasures, this toy is a spy's necessity! The Mini Metal Sensor Spy Toy is the lightweight and portable handheld metal detector that can be used indoors or outdoors to treasure hunt. And when you are looking for something really small, you can switch on the sensitivity modulator of the Mini Metal Sensor to activate the particle detector. So, when you are on the hunt for miniscule evidence or hidden treasures, be sure you have the Mini Metal Sensor Spy Toy from Alex Toys! Requires 1 "9V" battery, not included.