The diameter of waterproof endoscope probe is only 5.5mm, almost 3mm smaller than others sold. Combined with semi-rigid cable, making it easily access to narrow and dark places for nondestructive inspection, such as vehicle maintenance, wall circuit detection, drain pipeline repair and home appliance. Built-in 2200mAh rechargeable Lithium battery,endoscope inspection camera can works continuously up to 4-5 hours after fully charge, about 3-4 times longer than most endoscope sold in the market. Equipped with powerful flashlight and variable LED lighting allowing inspections in dark locations. Supports hotspot connection, the inspection camera not only work with Android smartphone tablet(Above Android 2.3), but also iPhone ipad device(Above IOS 6.0). You just need to install the "HD WiFi" app and connect to the WiFi hotspot of endoscope generated. Support IOS / Android / Windows system.Built-in battery WIFI transmitter, no additional power need. The inspection camera supports 3 devices most connection to WiFi at the same time. You could watch videos of your device with stable WiFi connection.