This anti-lost device is a product based on the latest Bluetooth 4.0 low-power technology. By using APP software and Bluetooth connection with mobile devices such as mobile phones, it is easy to lose items and valuables (such as keys, handbags, etc.). Bundled together, to achieve the anti-lost reminder of the item, to find the function of the mobile phone, and also to remotely control the camera, recording and other functions (such as: party photo, self-timer, etc.). The anti-lost device can effectively use the distance, up to 15 meters in the open range, even you can use it on your baby or pet, you no longer have to worry about losing them. Two-way alarm - When your mobile phone is connected to the anti-lost device, if you only bring your mobile phone when you go out, and leave the anti-lost device about 15 meters away, the mobile phone and keychain will alert you. Two-way search - When you leave your mobile phone or anti-lost device (with the easy-to-drop object) at home, you can find the phone through the anti-lost device, or you can find the anti-lost device on your mobile phone. Positioning search - If you don't pay attention to the lost item after the reminder, you can check the lost position through the positioning function in the APP, that is, the position disconnected from the phone. Self-timer function - Switch to the camera interface in the APP and click the anti-lost button to remotely take a selfie. specification: Material: ABS Appearance size: 10.8*9*1.5cm Applicable system: IOS 7.0 or above, android 4.4 Product color: black, white, red, blue, green, gold, silver, rose gold Note: APP app download: Download the Android system in the app app and download the ios system in the app store Bluetooth version: Bluetooth 4.0 Battery: CR2032 lithium button battery Working distance: about 75 feet (accessibility) Specifications: This anti-lost device is a product based on the latest Bluetooth 4.0 low-power technology. By using APP software and Bluetooth connection with mobile devices such as mobile phones, it is easy to lose items and valuables (such as keys, handbags, etc.). Bundled together, to achieve the anti-lost reminder of the item, to find the function of the mobile phone, and also to remotely control the camera, recording and other functions (such as: party photo, self-timer, etc.). The anti-lost device can effectively use the distance, up to 15 meters in the open range, even you can use it on your baby or pet, you no longer have to worry about losing them. Two-way alarm - When your mobile phone is connected to the anti-lost device, if you only bring your mobile phone when you go out, and leave the anti-lost device about 15 meters away, the mobile phone and keychain will alert you. Two-way search - When you leave your mobile phone or anti-lost device (with the easy-to-drop object) at home, you can find the phone through the anti-lost device, or you can find the anti-lost device on your mobile phone. Positioning search - If you don't pay attention to the lost item after the reminder, you can check the lost position through the positioning function in the APP, that is, the position disconnected from the phone. Self-timer function - Switch to the camera interface in the APP and click the anti-lost button to remotely take a selfie. Package Included: 1*Anti-lost keychain Note: 1. Please allow 1-3 mm error due to manual measurement and 1-3g weight error make sure you don't mind before ordering. 2. Due to the lighting of the photos and the difference of monitors, the pictures may not reflect the actual color of the real item. Please make sure you don't mind before ordering, thank you! About Shipping: 1.please pay attention to your delivery address such as: name, street, house number, doorbell/email without name, etc. is correct, or the order will not be delivered correctly. 2.All items will be shipped within 3 business days after the payment is received. Most times you will receive them within 8-12 days then. The specific delivery time is depend on circumstances. 3.During the shopping process, if you have any questions, please feel free to consult us, we will reply you within 24 hours Hope you have a pleasant shopping experience!