odm tour guide systems for wireless communications

{"cid":"91171271","title":"Two-way tour guide system for scenic spots","imgUrl":"https:\/\/img.chinax.com\/nimg\/19\/a4\/37c317dae78d7fc0405731264248-200x200-1.jpg","attrs":{"Price":"negotiation","Brand Name":"YingMi","Model Number":"008B","Minimum Order Quantity":"1","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":"746-828MHz","Channel quantity":"23CH","Channel spacing":"250KHz","Dimensions":"183mm(L)\u00d765mm(W)\u00d732mm(H)","Working Time":"\u2265 12 hours","Working distance":"\u2264 250 meters","Warranty":"two years","Weight":"100g"}}