The Teslong Flexible Borescope with Wi-Fi Adapter works with iPhone, iPad, Android, Windows & MacBook via WiFi or USB. With an adjustable, detachable, 90deg side-view mirror, you can check the barrel wall, or remove it to check the firing pin. The six LED Ring Lights are adjustable for brightness and give the camera a perfect view of the darkest inspection areas. This borescope is ideal for inspecting the barrels of longer firearms. The 0.2-inch flexible diameter probe allows easy entry into rifle barrels as small as .20 caliber. FeaturesWiFi Transmitter Compatible with Apple and Android mobile devices45-Inch Flexible Borescope ProbeFits .22 Caliber or Larger BarrelsLED Ring Light IlluminatedRemovable Side View Mirror IncludedBorescopeWF150 Wi-Fi Adapter3x 0.2 in (5 mm) Side-view Mirrors USB-A/Micro-USB to Aviation CableUSB-C Adapter