This anti-lost device is based on Bluetooth 4.0 low-energy technology. It connects to your mobile device via a dedicated app, helping you keep track of frequently misplaced items such as keys, handbags, and other valuables. The device enables two-way tracking, allowing you to locate your phone or the attached item with ease. It also supports remote camera control for features like taking selfies or using a self-timer. The device offers an effective working range of up to 15 meters (approximately 75 feet) in open space. It includes a two-way alarm function: if the connection between the device and your phone is broken beyond the range, both the phone and the device will alert you. Use the two-way search feature to locate your phone or the attached item from either end. The app also provides a last-known location feature that shows where the device disconnected from your phone. Additional features include remote camera shutter control, ideal for group photos or self-timers. Specifications: - Material: ABS - Dimensions: 10.8 x 9 x 1.5 cm - Compatible with: iOS 7.0 and above, Android 4.4 and above - Available colors: Black, White, Red, Blue, Green, Gold, Silver, Rose Gold - Bluetooth version: 4.0 - Battery: CR2032 lithium button battery Note: The app can be downloaded from the App Store for iOS devices or from the Play Store for Android devices. Package Included: 1 x Anti-lost Keychain