Smart otg function - with the smart otg function, you can now record video or take snap shot photos on your mobile phone. or, you can work on your pc or laptop with the usb connection. 3 useful mini tools - supplied with 1pc hook, 1pc reverse mirror and 1pc magnet. these accessories are very useful for it but could be very expensive for 5.5mm (dia.) camera. we offer them for free! Android 4.0 or above - it works with android 4.0 or above such as samsung galaxy s4 s5 s6, note 2, note 3, note 4, note 5 ,htc m9 ,m9+,m8,lg g4 and etc. (not for apple ios system) Ultra slim 5.5mm 6 led & 5m long - it equips with ultra slim 5.5mm diameter camera head with 6pcs super bright led with adjustable brightness and 5 meters cable for long distance searching. inserting through narrower hole! providing brighter lighting. Wide applications - ideal for automobile repair detector, sewer pipeline detector, search and rescue, criminal and custom detector, archaeological detect, the pcb detection, home care, aviation and space industries, care and tractors industries, petroleum drilling industries, constructions and so on.