300m far transmission tour guide

{"cid":"91171271","title":"Tour Guide System 796.0 - 821.0mhz With Clear Sound Quality","imgUrl":"https:\/\/img.chinax.com\/nimg\/4d\/15\/d0d9ed062e3c2099d08c5c42c488-200x200-1.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, ","Supply Ability":"10000pcs for one month","Packaging Details":"packed in carton box","Frequency response":"20Hz-16KHz","Working frequency":"746-823MHz","Channel quantity":"23CH","Transmitter power":"15dBm","Dimensions":"86mm\u00d760mm\u00d719mm","Distortion factor":"<1%","Working distance":">=250m","Warranty":"2 years","Brand":"YingMi","Frequency offset":"<3k"}}

{"cid":"91196630","title":"GUIDE,CHAIN Part number: ZJ0112610 for MAZDA","imgUrl":"https:\/\/img.chinax.com\/nimg\/86\/3e\/354de0e31fd21a3bd682b5eb2584-200x200-1.jpg","attrs":{"Price":"Negotiable price","Brand Name":"KING","Model Number":"MAZDA","Minimum Order Quantity":"1 pcs","Delivery Time":"10 work day","Payment Terms":"T\/T","Packaging Details":"Neutral packing or according to customer's requirement brand color box","OE No.":"ZJ0112610","Car make":"MAZDA","Packing":"Neutral packing or according to customer's requirement brand color box","Warranty":"1 Years","Quality":"100% Tested","Condition":"new"}}

{"cid":"91224472","title":"Guide Visual P2.9 Indoor Rental LED Display Curved Video Wall High Refresh 7680Hz for Stage Event Exhibition","imgUrl":"https:\/\/img.chinax.com\/nimg\/25\/6e\/0a570d307c7f124358c852948b20-200x200-1.jpg","attrs":{"Price":"Negotiation","Brand Name":"Guide Visual","Model Number":"GS","Minimum Order Quantity":"1","Delivery Time":"15-20 Days","Cabinet Material":"Die-cast aluminum","LED Type":"SMD 1912","Brightness":"5000 nits","IP Rate":"65","Pixel Pitch":"P1.9\/P2.6\/P2.9\/P3.91\/P4.81","Cabinet Weight":"6.8kg\/11.2kg","Place of Origin":"Shenzhen,Guangdong,China","Packaging Details":"Flight Case","IP Rating":"IP65","Power Consumption":"Max 800W\/sqm","Certification":"CE\uff0cRohs\uff0cCE\uff0cFCC","Input Voltage":"AC 110-220V","Warranty":"2 years","Module Size":"250mm*250mm","Contrast Ratio":"2000:1","AC input frequency":"50\/60 HZ","Payment Terms":"L\/C,D\/A,D\/P,T\/T,Western Union,","Cabinet Size":"500*500mm or 500*1000mm","Driving Method":"1\/28s","Gray Scale":"16 bit","Ave power consumption":"250w\/sqm","Supply Ability":"2000-3000 sqm per month","Refresh Rate":"7680Hz","Operating Temperature":"-20\u00b0C ~ 60\u00b0C","Viewing Angle":"160\u00b0\/160\u00b0","AC input voltage":"AC 220-240 V"}}