Electric-Focus & 4D/4P CorrectionIn order to meet customer needs, the TR23 Mini Projector has been upgraded with electric focus, just press and hold the focus button to quickly focus the screen to capture a sharp image. Compared with other home projectors, it is more convenient and faster to focus. The 4D/4P correction function allows you to easily adjust all four points and all 4 sides on the projection screen through the remote control, you can adjust the image to a rectangle easily. Fully Sealed Optical Machine DesignThe TR23 home smart projector uses unique craftsmanship to make every detail exude exquisite charm. It breaks the traditional appearance and makes it both fashionable and portable. Adopting a fully sealed optical system that prevents dust pollution on optical components (IP5X certification), Say goodbye to screen yellowing, black dots, and light leakage issues. And the noise is greatly reduced, allowing you to enjoy an immersive home theater experience. Ultra-fast 5G/2.4G WiFi & 5.2 BluetoothThe home cinema 1080P HD projector is equipped with an advanced 5G WiFi chip, which can effectively avoid signal interference. This makes the transmission more stable and faster preventing lag and freezing of the screen during playback. Also, the mini WIFI projector includes a built-in speaker and supports the 5.2 Bluetooth function, which allows connection with Bluetooth headsets, Bluetooth speakers, Sound bars, and AirPods without hassle.