If you want to pair Bluetooth devices with your SmartProjector, please follow the step:
Go to “Settings” > “Remotes & Accessories” > “Pair accessory”>select the Bluetooth device that you want to pair>select “Pair”.
Streaming Videos from Your Android Devices to the Projector
1. Connect your phone and the projector to the same network. The network can be Wi-Fi or your phone's hotspot.
2. Chromecast can only open applications that support Chromecast, such as YouTube and Prime Video. To find more information about apps that support Chromecast, please install the Google Home app on your phone.
3. When the app is playing a video, click the Chromecast button at the top to search for a Chromecast-compatible device. Select the TCL SmartProjector and you can cast the video.