This is a radio device that complies with the Radio Act technology standards. Frequency Range: 2.4 GHz Slim (2022) is a model that cannot be replaced with batteries, but it can be used for up to 3 years, so you can use it with confidence for a long time. Water resistant. Thin profile makes it perfect for wallets and card cases. Tile is a smart tracker where you can find what you are looking for; Connect your smartphone with Bluetooth and hear a sound from your tile, by clicking the button on the Tile itself, you can also ring your smartphone from the Tile by clicking the button on the tile.