gfsk tour guide radio system

{"cid":"91171271","title":"Black Tour Guide Radio System Using Advanced GFSK Modulation Mode","imgUrl":"https:\/\/img.chinax.com\/nimg\/cd\/a6\/e892d079c8c43ab3815f8fedfe28-200x200-1.jpg","attrs":{"Price":"negotiation","Brand Name":"YingMi","Model Number":"R8","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":"10000pcs for one month","Packaging Details":"packed in carton box","Brand":"YingMi","Working current":"Standby:35mA","Channel number":"100CH","Warranty":"2 years","Color":"Black","Battery capacity":"310mAh","Frequency response":"20-22K","Work distance":">180m","Modulation":"Four levels of circulation"}}

{"cid":"91224423","title":"98dB Sensitivity Single Side Disposable Earphone for Tour Guide or Monitor System Receiver In ear Headphone Form Factor","imgUrl":"https:\/\/img.chinax.com\/nimg\/a5\/32\/156462014d4fe0610a98dfce7f32-200x200-1.jpg","attrs":{"Price":"$0.12-0.29\/pieces","Minimum Order Quantity":"10000 pieces","brand name":"ODM","place of origin":"Jiangxi, China","chipset":"Others","Codecs":"None","Cord Length":"1.2M","Headphone Form Factor":"In ear","interface type":"3.5 mm","material":"Plastic","Noise Cancelling":"No Noise Cancellation","private mold":"No","Waterproof Standard":"No","Product name":"headphone for airline","Item":"business earphone","Name":"cheap earphone","Certificate":"ISO9001 ISO14001 and GB\/T28001","Package":"Blister package\/plastic box\/pouch\/ Poly bag\/gift box\/Customized","Usage":"MP3\/4\/5\/Cellphone\/PC\/Music player\/Mobile","Material":"ABS+PVC","Sensitivity":"98dB","Frequency Range":"20Hz - 20KHz"}}