20khz automatic tour guide system

{"cid":"91171271","title":"White M7 Audio Tour Devices Automatic Tour Guide System For Self - Guided Tours","imgUrl":"https:\/\/img.chinax.com\/nimg\/8c\/1b\/bf765619c4c91857a8e27567e3a9-200x200-1.jpg","attrs":{"Price":"negotiation","Brand Name":"humantek","Model Number":"M7","Minimum Order Quantity":"1pcs","Delivery Time":"7days","Product":"Audio guide device","Color":"White","Feature":"Auto Induction","Dimensions":"5.8*7.5*1.3cm","Power":"Lithium Battery","Application":"Audio guide for museum","Certification":"CE,RoHS","Place of Origin":"China","Payment Terms":"L\/C,Paypal","Supply Ability":"300 pieces per week","Packaging Details":"packed in carton box"}}

{"cid":"91224423","title":"Tour Guide Headphones with 20Hz 20KHz Frequency Range and Single PIN Disposable Wired Earphones","imgUrl":"https:\/\/img.chinax.com\/nimg\/52\/20\/56af6548ddc5546aaf231bd3a093-200x200-1.jpg","attrs":{"Price":"$0.40\/pieces 1000-9999 pieces","Minimum Order Quantity":"1000 pieces","place of origin":"China","chipset":"Others","Codecs":"None","Cord Length":"1.2M","private mold":"Yes","Waterproof Standard":"No","Plug":"3.5mm","Package":"Blister package\/plastic box\/pouch\/ Poly bag\/gift box\/Customized","Type":"Aviation\/MP3\/4\/5\/Cellphone\/PC\/Music player\/Mobile","Material":"ABS+PVC","Sensitivity":"104\u00b110%DB","Frequency Range":"20Hz - 20KHz","Speaker":"13mm","Color":"Customized Color"}}