Smart tracker for keys: Key finder uses BT 4.0 technology to connect Android, iOS, iPad and other smart phones. Show the lost car key, luggage, wallet, dogs, cats distance from you on the APP to let you find them accurately.5 pack smart tracker locator contains black, green, blue, pink and white.<br> Easy to operate: APP remotely control Download free APP iSearching then pair it with your smart phone. When you press the remote button, the receiver sounds "beeps" you can hear voices from smart tracker within 30-49 ft. When the key tracker is connected to the mobile phone via Bluetooth, the anti-lost device can be used as a remote control button to control the photo shutter of the mobile phone, and it is easy to press, leaving a beautiful moment.<br> Ultra-Low Power:The built-in CR2032 button battery is replaceable<br> Finder keychain: Key finder smart tracker is compact size, light weight and easy to carry like a key chain on your kids schoolbag or hang on pet collar, real-time viewing locator effectively avoids your kids, pets are lost. Provide a last seen pin-drop on map via APP to help you recover your items and search your car in parking site.Products from GuanGuan's store 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!