Set includes RFID passport 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 passport wallet again with one touch find.Item Size: 4 1/4 W x 5 HImprint Area: 3 W x 4 H