<p>Product specification: Packaging quantity: One set. Color: Black. Material: ABS+PC. Sound: 80 decibels. Distance: 30 meters. Frequency: 499.82 MHz. Battery: AAA * 2 (meters); CR2032 * 5 (receiver) does not include batteries. Product size: Transmitter: 105 x 45 x 13mm; Receiver: 49 * 35 * 10mm. Packaging size: 183 * 105 * 33mm. Gross weight: 108 grams Net weight: 70 grams. Product Description: Our main target locator consists of four small compact receivers\/locators. It can easily help you find any item, keychain, key, toy, cat, dog, etc. Greatly saving emergency time and reducing lost items. Sometimes hastily searching for lost items can waste a lot of time, but by using the key finder item tracker, we can find them more efficiently and easily, just by making a sound of anti loss key search. Using an intelligent key tracker can make your life more comfortable and solve many unnecessary troubles. Leather, etc., can help you find your belongings 40 meters away. Therefore, no matter where you place objects, including corners, you can easily find them, with a sound of 80 decibels, which is easy to find. 1 transmitter and 4 receivers, with this anti loss key finder, you don't need to rush to find something, just press the corresponding button to search, and you can easily find it. You can replace the battery yourself, not including the battery.</p>