9v ear listen through wall device

{"cid":"91149500","title":"Stereo 9V Multifunction Listen Through Walls Professional Device","imgUrl":"https:\/\/img.chinax.com\/nimg\/23\/c3\/4c9650c184147b573478d43f9910-200x200-1.jpg","attrs":{"Price":"USD 1200-USD4000","Brand Name":"HEWEI brand","Model Number":"HWCW-IV","Minimum Order Quantity":"1 set","Certification":"YES","Place of Origin":"Made-in-China","Payment Terms":"T\/T","Packaging Details":"carton package, wooden package, 40*25*15cm","Dimension":"MCU(main control unit): 131\u00d7125\u00d742mm; 41\u00d718\u00d715mm","Total Weight":"956g","Power Supply":"Built-in 9V battery","Battery Working Time":"5 hours without recording; 4 hours with recording","Audio input":"Left and right double track","Audio output":"Left and right output simultaneously, or left and right output separately","Audio adjust":"Gain adjustment, low frequency, high frequency filter adjustment and volume adjustment","Headphone output":"3.5\u201d standard interface","Recording output":"Built-in recording module, real-time recording by USB external dedicated recording memory","Recording memory":"16GB (continuous recording about 500 hours)"}}