Klein Tools ET16 Borescope features a 9 mm camera surrounded by 6 LEDs attached to a 10-Foot (3 m) armored gooseneck cable. The digital camera has a USB Type-C (and micro-USB) connection for most Android® (OTG 4.0 or higher) smartphones and devices. The camera and video output is displayed on the Android® device using the free Klein Tools ET16 Borescope App. The ET16 does not require batteries; it is powered by a device connection.