Long Range Key Finders are small electronic devices that use Bluetooth or radio frequency (RF) technology to help you locate lost items like keys, wallets, or even pets. They are typically attached to the item you want to track and can be paired with a smartphone app.  

How they work:

• Bluetooth or RF: The key finder emits a Bluetooth or RF signal that your phone can detect.  
• App connection: When you lose an item, you can use the app to search for it.
• Location tracking: The app will display the approximate location of the lost item based on the signal strength.  
• Audio cues: Many key finders also emit loud sounds or vibrations to help you pinpoint the exact location.  

Key features to look for:

• Range: The distance the finder can be detected from your phone.  
• Battery life: How long the device can operate on a single charge.
• Additional features: Some key finders may offer other features like a built-in flashlight or the ability to track multiple items.  

Popular brands: Tile, Apple AirTag, Samsung Galaxy SmartTag, and Chipolo are some of the well-known manufacturers of long-range key finders.