7" Monitor DVR Pipe Wall Sewer Inspection Snake Video Camera with 512HZ Locator

(1 512Hz PIPE Locator. 512HZ TRANSMITTER Receiver Frequency: 512HZ. 3.512hz:Built in 512hz transmitter. （DVR Edition). 12V 4500mAh Li-battery included supports approximate 8 hours of continuous use.

eBay