1、HD 4K hard decoding and full HD resolution, 5G/2.4G dual frequency channel signal transmission. 2、In the same WiFi environment, mobile phones or tablet devices can share the same screen with one key, which is convenient and fast. 3、Diffuse reflection light is not direct, weakening the dazzling blue light, and softer eye protection. 4、Built-in wear-resistant coated glass lenses and high-quality LED bulbs ensure that the screen is bright and stable. 5、The projection distance is 1‑5m, and the trapezoid correction function is supported to ensure a good projection effect. Item Type: Projector Model: C99 Type: Multifunctional System: For Android 9.0 Processor: For ARM Mali-G31 MP2 GPU Resolution: WVGA 854 x 480 Brightness: 55 ANSI Lm Lamp Type: LED Projection Technology: DLP Speaker: 1 x 1W Screen Ratio: 16: 10: 00 Power Consumption: Optical Machine: 3W, Whole Machine: 5W Contrast Ratio: 500: 1 Projection Distance: Approx. 1-5m / 3.3-16.4ft Built-in Battery Capacity: 3000mAh How to Use: 1. Turn On: First turn the power switch to the "ON" state, then press the start switch to turn on, the indicator light is blue, waiting for the screen to display; if the battery is low, please connect the power adapter to the charging port of the projector to charge. 2. Clarity: Turn the focus gear of the projector up and down to adjust the clarity of the picture. 4. Trapezoid Correction: A. Vertical Trapezoid Correction: Enter "Settings" to "Vertical Trapezoid Correction" on the main interface, the machine defaults to automatic correction, and manual correction is also supported. B. Horizontal Trapezoid Correction: Enter "Settings" to "Projection Settings" and then "Horizontal Trapezoid Correction" on the main interface, which supports manual correction and multi-angle adjustment. 5. Wifi Settings: The main interface enters "Settings" to "WiFi Settings", click the switch to the "ON" state, select the network that needs to be connected, enter the password, and click "Connect". 6. Bluetooth Settings: The main interface enters "Settings" to "Bluetooth Settings", click the switch to the "ON" state, search for the device that needs to be connected, and pair it. 7. On the main interface, enter "Settings" to "Language Settings" and select the language to be switched. 8. Shut Down: First press the start switch, the interface pops up a shutdown prompt, click "confirm" to shut down, after the projector stops moving, turn the power switch to the "OFF" state, otherwise the battery will still be in a good state. 1 x Projector 1 x Remote Control 1 x Bracket 1 x Charging Head 1 x High Definition Multimedia Interface Cable 1 x Data Cable 1 x User Manual