250m distance audio guide system

{"cid":"91171271","title":"Government And Enterprise Reception Audio Guide Ear Hook Type Clean And Hygienic","imgUrl":"https:\/\/img.ismap.com\/nimg\/31\/fc\/0e920e0d776f9994f4603053d58b-200x200-1.jpg","attrs":{"Price":"negotiation","Brand Name":"YingMi","Model Number":"R8","Minimum Order Quantity":"1pcs","Delivery Time":"3-7 days Name\tValue Working frequency:\t860MHz-870MHz; Other frequency can be customize Channel quantity:\t100CH; Modulation mode:\tGPSK; Working distance:\t>200m; Battery c","Certification":"CE,RoHs","Place of Origin":"China","Payment Terms":"L\/C, T\/T, Western Union, MoneyGram","Supply Ability":"10000pcs one month","Packaging Details":"packed in carton box","Brand":"YingMi","Working frequency":"860MHz-870MHz","Channel quantity":"100CH","Frequency response":"20-22K","Working current":"45mA","Receiver dimensions":"100*50*18mm","Warranty":"2 years","Power":"Lithium Battery","Battery capacity":"310mAh","Color":"Black"}}

{"cid":"91199845","title":"4K 4096x2160p DVI Fiber Converter Single Mode 750m LC Connector DVI to Fiber Extender","imgUrl":"https:\/\/img.ismap.com\/nimg\/45\/02\/f5b1a1b6484272fe7701a52e1dc5-200x200-1.jpg","attrs":{"Brand Name":"NUFIBER","Model Number":"NF-101MB-T\/R","Minimum Order Quantity":"1pair","Delivery Time":"1~3working day after payment","Certification":"CE RoHS FCC","Place of Origin":"China(mainland)","Payment Terms":"T\/T, Western Union","Supply Ability":"1000pair\/month","Packaging Details":"Packing Size\/per boxes:21mm*15.6mm*5.3mm 40 Boxes \/ carton or As Your Mind","Product Name":"DVI Optical Extender","DVI input\/Output":"1x DVI-D 18+1 Male connector","Color":"Black,Golden","Dimension":"39* 59* 15 mm","Fiber Type":"MM;1xLC Connector","Distance":"500meters","Support resolution":"1920x1200\/60Hz","Warranty":"1 Year","Power":"DC5V 1A","Working Temperature":"0\u2103~+50\u2103"}}

{"cid":"91200029","title":"250W High Power 4 Ports Poe Switch Fast Cooling Dante Poe Switch","imgUrl":"https:\/\/img.ismap.com\/nimg\/79\/f2\/589d48a0e88c9e399934428b90ef-200x200-1.jpg","attrs":{"Price":"USD8-USD18","Brand Name":"HK","Model Number":"HK-F1R5","Minimum Order Quantity":"100PCS","Delivery Time":"10-15WORKING DAYS","Certification":"FCC, ce, RoHS, CE FCC RoHS ISO9001:2015","Place of Origin":"SHENZHEN","Payment Terms":"L\/C, D\/A, D\/P, Western Union","Supply Ability":"5000000PCS\/YEAR","Packaging Details":"118*95*28mm","Communication Mode":"Full-Duplex & Half-Duplex","Transmission Rate":"10\/100Mbps","Ports":"4+1ports","Operating temperature:":"-20~+55\u00b0C","Total PWR \/ Input Voltage:":"65W (AC100-240V)","PoE Ports:":"Port 1- 4","Switch Capacity:":"1.6Gbps","Function:":"POE"}}