prompt1. Sharpness and phone screen resolution are closely related to the corresponding video.If you are tired of watching movies, you can use eye exercises to relieve eye strain.It is recommended that you take a proper rest for 30 minutes.3. This device is strictly forbidden when charging the phone.product informationType: virtual reality helmet / VR glasses + game controllerDisplay size: 100 (inch)Gamepad: A-battery / B-chargeResolution: 1080PScreen size: 4.0-6.0 inchesApplicable: Business, Adult, Elderly, Fashion, Public, ChildrenOperating system: IOS/AndroidMedia format: MPEG-4, WMV, RMVB, MPEG, RM, MP3, AMR, WMADisplay size: 4-6 (inch)Digital glasses function: social entertainmentMaterial: ABSOperating system: IOS/AndroidAppearance size: 200 × 110 × 216MMPacking list: main unit, manual, lens cleaning clothLens material: PMMALens size: 42MMAnalog view screen (inches): 3 times the screen of the phoneMyopia: support myopia below 400 °High lens: 95%Lens: aspherical resin lensHorizontal field of view (FOV): 90-120°Speaker sensitivity: 112dB / mWSpeaker impedance: 32°Frequency response range: 20-20000HzConnection diameter: 3.5mmHeadphone plug type: inline