two way radio audio guide system

{"cid":"91171271","title":"Audio Guide System Have Unique Two Way Radio 746 - 823MHz","imgUrl":"https:\/\/img.chinax.com\/nimg\/4d\/86\/0612faf2c95bed343fd373005b9a-200x200-1.jpg","attrs":{"Price":"negotiation","Brand Name":"YingMi","Model Number":"008B","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 frequency":"746-823MHz","Channel quantity":"23CH","Oscillation frequency":"+\/-2ppm","Dimensions":"86mm\u00d760mm\u00d719mm","Separation factor":"70dB","Working distance":">=250m","Warranty":"2 years","Channel spacing":"250KHz","Frequency offset":"<3k"}}