The top of the body is equipped with a focus wheel. When the screen needs to be focused, you can gently roll the wheel left and right to focus.Equipped with a high-performance processor: with a high-performance processor, dual-threaded cache, the speed is increased by 120%, and multi-task background operation/free switching can also be easily handled.The fuselage is equipped with 1 HDMI 2.0 interface, 1 USB2.0 interface, 1 headphone interface, supports 1080P picture input and playback, can fully match hard disks, game consoles, microphones, etc., to meet diversified entertainment needs.Optical parameters:Projection Technology: LEDLight machine brightness: 30000 bulb brightnessCompatible resolution: 1920*1080 resolutionThrow ratio: 1:2:1Keystone correction: four-point/vertical correctionProjection parameters:Projection size: 50-250 inchesProjection ratio: 16:9/4:3System parameters:Processor: 12 coresOperating system: Android smart systemLED life: more than 50000 hoursInput interface: DC-IN*1, HDMI*1, USB*1, TF*1Output interface: 3.5mm audio interfaceWiFi: High-speed WIFIBluetooth: BT4.0Product size: 11*13.6*5.8cmProduct weight: four points/keystone correctionPacking: Mini HD projector *1