2 PCS HYC-09 Dog Paw Bluetooth Anti-Lost Device Pet Tracking Locator Keychain Smart Search Two-Way Alarm Features: 1. It can be carried around and is very slim. It can be applied to different things to help users find items, such as wallets, keys, mobile phones, bags, etc. It also has a memory function for lost items, suitable for daily life, office and travel. 2. Using low-power Bluetooth chip solution, stable performance, low false alarm rate, long standby time, easy to use, suitable for iOS7, Android 4.3 and above, and suitable for Bluetooth 4.0 and above machines. 3. With two-way anti-lost, anti-forget, one-key tracking, lost location, exchange management, network search, multi-task management and other practical functions, it reminds you to take your belongings with you like a personal secretary 4. The APP display language follows the language of the mobile phone operating system. For example, the APP of the English mobile phone system will be automatically displayed on the English version. 5. Two-way anti-lost alarm, mobile phone camera control and recording functions parameter: 1. Bluetooth version: 4.0 2. With button battery: 210 mAh 3. Bluetooth distance: 20 to 50 meters (without obstacles) 4. Use time: the longest use time is 180 days 5. Material: Plastic 6. Size: about 42 x 40 x 10mm 7. Net weight: about 5.5g