Please Note:1. The endoscope camera only work for Android phones(above 4.0) that supports OTG function and external cameras -both conditions are required.2. 100% support PC system.3. Don't support iOS system.What need you do before purchase:1. Make sure your phone can support OTG functionality and also compatible with the UVC ( USB video device class) .2. Doogee, Huawei, Coolpad, BBK, VIVO, Lenovo and other "made in China" brands are not compatible with this camera. Please check your phone brand carefully before purchasing.3. Due to the lack of external cameras, all the Samsung A/J series and Samsung S7 mobile phones are not be compatible with this camera. For other Samsung phones, please check it whether supports OTG functionality and external cameras.4. Test Way:a. Have an OTG cable.b. Use the OTG cable to connect phone with some equipments like keyboard, mouse, U disk, if you can use it normally, it means the phone support OTG function.5., If you not sure your phone fit or not , please contact with seller before you buy it.Please carefully check your phone before ordering, or we'll not be responsible due to the reasons above.3.9mm Single Lens Endoscope:Lens Diameter: 3.9mmBest Resolution Distance5cm-10cmWaterproof: IP67 waterproof cameraFree Gift: 1 set accessoriesCable: soft cable/hard cableHD 720P endoscope3in1 endoscope camera(Android/Type-C/PC)6 LEDs White Lights Brightness adjustableSupports recording audio and video, directly stored in the phone.The lens does not auto-focusFree Gift: 1 set accessoriesSupports recording audio and video, directly stored in the phone.The lens does not auto-focusHow To Use it:1: Scan the QR CODE to download the APP.2: Connect the product with your phone.3: Open the APP, then you could see the image.