Works with Apple Find My: Apple users can easily connect the tracker to the Find My app via Bluetooth, allowing global tracking of your belongings through the vast Apple device network. Water-Resistant with Rechargeable Battery: The SmartTrack Card has a rechargeable battery that lasts up to 1 year on a single charge. Its water-resistant design ensures durability, even in rainy conditions. Ultra-Loud 80dB Alarm: The SmartTrack Card's loud 80dB alarm ensures you can hear alerts, even in noisy environments. Compact and Lightweight: At just 2.6 millimeters thick and ultra-lightweight, it fits perfectly in your wallet, passport holder, laptop case, or folder. Shareable Location: The eufy Security app allows you to share the location of your items with friends and family.Free Left-Behind Alerts: The Find My app sends instant notifications when you leave an item behind. No subscription is needed. What's in the Box: SmartTrack Card E30, Quick Start Guide, USB-C Cable, and Magnetic Charging Adapter. The magnetic charging adapter is compact and may be easily misplaced. We recommend keeping it in the packaging box to prevent loss. eufy SmartTrack Card E30 (Black, 1-Pack), Rechargeable, Works with Apple Find My (iOS Only), Bluetooth Tracker, Perfect for Wallet, Passport, and Laptop, Water Resistant, White Elephant Gifts