Set includes RFID card wallet and seek two way tracker. Follow instructions to download the seek app and pair to your handheld device. Using two way technology, locate a seek device from your phone or find your phone by triggering an alert from the seek, Multiple seek devices can be paired to the app simultaneously. Replaceable cell battery included. Wallet made of polyurethane. Prevents data transfer between the wallet and reader. Wireless two way tracker featuring Bluetooth technology. Never lose your card wallet again with one touch find. Map where your seek device was last tracked. Connects up to 120 feet from your phone or tablet. Place your credit cards in holder to prevent cyber hackers from stealing your identity. Works with any contactless chip card. Cards that are swiped do not send RFID signals and will not be protected by an RFID blocker.Item Size: 4 W x 2 7/8 HImprint Area: 3 1/4 W x 2 H