Specification: Name: LED String Lights Protection level: IP65 Luminous flux: 6 (lm) Color temperature: 3000 (K) Input voltage: 5 (V) Size: 2M 20LED 5M 50LED/10M 100LED/15M 150LED/20M 200LED optional Function: Different dynamic modes Sync to music. Custom to create your great led moon lighting Features: 1.LED bulbs on the unique Christmas light string is a smart bulbs that is fully programmable. 2.You either select pre-made light designs and animations from the app or even program your own design to match your favorite sports teams colors and unique animation and more. 3.App Controlled: All lights can be remotely controlled by the application available on iOS App Store. 4.Quick Setup: The setup is really easy and takes just a moment thanks to the Bluetooth pairing. Wi-Fi Connection. The lights can be setup with your local home/office Wi-Fi so that you don't need to establish a connection every time you use the light. 5.Weatherproof: The products have IP44 protection which makes them perfect for both indoor and Outdoor use. Package inclulding: 1 set x LED String Lights(mobile phone is not included and the tree) Solve the cause of not working After downloading the APP; Connect the Bluetooth lamp to the mobile phone. First the mobile phone turns on Bluetooth; Then the lamp is powered on; Then turn on the APP; At this time the APP will automatically connect to the Bluetooth lamp; Do not manually connect Bluetooth at the settings of the mobile phone. Mobile phone settings Bluetooth search Bluetooth devices some mobile phones can be searched some can not be searched the search is not supported by the mobile phone system does not mean that the APP cannot be used. open the APP the device cannot connect. 1. Check whether the lamps are powered normally 2. Whether the Bluetooth of the mobile phone is turned on. 3. Is there any other mobile phone already connected if connected please disconnect Bluetooth 4. only supports one-to-many does not support many-to-many control. Whether the Bluetooth device is connected at the settings of the mobile phone if it is connected please disconnect the APP will be re-opened after the background exit and the APP will automatically connect; 5. Normal operation still can't connect please exit the APP and reopen it in the background; 6. Exit the APP background restart the phone and power on the lamp again; Reopen the APP software and connect again.