dc12v 4500mah built in battery pqwt water detector

{"cid":"91206881","title":"PQWT S150 S300 S500 Underground Water Detector with 0.1mV Accuracy 10KG Weight and DC12V 4500mAh Built-in Battery","imgUrl":"https:\/\/img.chinax.com\/nimg\/c7\/55\/0b0b9b4e381985937ad60ca2d6b4-200x200-1.jpg","attrs":{"Brand Name":"PQWT","Model Number":"PQWT-S150 S300 S500","Minimum Order Quantity":"1","Place of Origin":"Hunan, China","Operating frequency":"Multi-Frequency","Channel":"3","Weight":"10KG","LCD Size":"7 HD Touch Screen","Power supply":"DC12V 4500mAh Built-in Battery","Frequency":"Triple, Multiple","Conversion Range":"0mV-2000mV","Input Impedance":"\u226510M\u03a9","Accuracy":"0.1mV","Depth":"150m","Measuring range":"0-1000mV","Display":"7 inch LCD Touch Screen","Working Temperature":"-20~40\u2103","Measurement Resolution":"0.001mV","Precision":"\u00b12%"}}