METER COUNTER: Simultaneous display/cleared Metric and Feet. 512HZ TRANSMITTER And Self-Leveling Camera: This endoscope camera has a built-in 512 hertz transmitter that helps to easily detect any blockage or area of interest. This greatly helps save time from having to dig and locate the problem. The sonde transmits a 512Hz signal that can be picked up with any compatible locator, allowing you to pinpoint the transmitter’sposition underground. （Locator Receiver is NOT included） Video + Audio + 5X Image Enlarge: Pipeline Wall Sewer Inspection Snake Camera built-in TF Card slot,16GB TF card included,it is avialiable to view live video and save video recording and photos and audio record. You can record the inspections and playback via the pipe system. （DVR Edition Vi.