This is a smart Wallet with built-in tracker, it works Android device or Ios users, both are okay. It should download an application named "BSEEK" from google player or app stored. The wallet is paired with mobilephoen via Bluetooth. The smart features for this wallet : left behind notification, two way tracking, selfie remote control, last location history. Built-In tracker Wallet: Smart wallet built-in tracker works with an app named "bseek",please download it from Google player or app store. It works with Android device or IOS device, both are okay. Left-Behind Alerts: Get instant notifications on your smart Phone if you accidentally leave the tracker wallet behind. Find wallet anywhere: Within the range of Bluetooth, the mobilephone can track the wallet anywhere. Find the mobilephone anythere: Within the range of Bluetooth, the wallet can track the mobilephone anywhere too. The inbuilt tracker is rechargeable. It charges with a standard USB-C port located inside the wallet, behind the compartment with the window slot. The wallet is also easy to use and has a good number of slots for cards. The material of wallet is leather wallet. The tracker and charger are completely integrated. It has quite a few slots for cards and a standard compartment for cash inside. People like that - some new wallets won't hold cash inside. This wallet can hold a total of 9 cards, including credit cards, drivers license, and insurance cards. This is a smart Wallet with built-in tracker, it works Android device or Ios users, both are okay. It should download an application named "BSEEK" from google player or app stored. The wallet is paired with mobilephoen via Bluetooth. The smart features for this wallet : left behind notification, two way tracking, selfie remote control, last location history.