Features: Made of high-quality ABS material, waterproof, solid, durable and wear-resistant. Multi-functional, can be used in various scenarios such as pet tracking, locating items, and taking selfies. Supports Bluetooth connection with mobile phone for real-time locating. Designed primarily to help locate and prevent loss of pets. Also suitable for use with handbags, purses, cars, children, suitcases, object search, alarms, selfies, and other applications. Compatible with Android systems on Bluetooth 4.0 smartphones (Android 4.3 and above). Function: Supports Bluetooth connection with mobile phone and two-way search function, allowing connection to up to 10 pet locators simultaneously. When the anti-lost device moves out of the monitoring range, both the phone and device will trigger an alarm. Allows checking the last known location on your mobile phone after disconnection. Includes a do-not-disturb mode that can be set to mute for specific periods to avoid interruptions during work or important events. Enables remote control of the mobile phone's camera shutter and self-timer functions. Specification: Material: ABS Color Options: Pink, Blue, White, Black, Green Battery: CR2032 Lithium Battery (battery not included) Bluetooth: Bluetooth 4.0 Mobile Phone System: Compatible with Android devices supporting Bluetooth 4.0 (Android 4.3 and above) Size (LxW): Approx. 5x3 cm / 1.97x1.18 inch Packing List: 1 x User Manual 1 x Pet Locator Note: The effective operating range of this anti-lost device is up to 10 meters in open areas. GPS accuracy is limited and may only provide location at the street or block level. Please consider this before purchase.