automatic tour guide system 20khz

{"cid":"91171271","title":"M7C Automatic Tour Guide System , RFID Team Tour Guide System","imgUrl":"https:\/\/img.chinax.com\/nimg\/a0\/23\/0d2f6fae12dfd0a0ee772120fa9b-200x200-1.jpg","attrs":{"Price":"negotiation","Brand Name":"YingMi","Model Number":"M7C","Minimum Order Quantity":"1pcs","Delivery Time":"3-7 days","Certification":"CE,RoHs","Place of Origin":"China","Payment Terms":"L\/C, T\/T, Western Union, MoneyGram","Supply Ability":"1000 pieces per week","Packaging Details":"packed in carton box","Brand":"YingMi","Technology":"RFID","Frequency":"2.4G","Power supply":"Lithium battery","Weight":"50g","Dimensions":"75*58*13mm","Warranty":"2 years","Storage mode":"Adaptive Flash","Audio Mode":"MP3","Frequency response":"20Hz-20KHz"}}

{"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"}}