automatic sensing tour guide audio system

{"cid":"91171271","title":"RFID Automatically Sense Tour Guide System Adaptive Flash","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/28\/6a\/e1cbeafda6d4b42785741eb13976-200x200-1.jpg","attrs":{"Price":"negotiation","Brand Name":"YingMi","Model Number":"M7","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","Frequency response":"20Hz-20KHz","Weight":"50g","Frequency":"2400 MHz - 2483.5MHz","Power supply":"Lithium battery","Model":"RFID","Storage mode":"Adaptive Flash","Dimensions":"75*58*13mm","Languages":"8 language for optional","Standby time":"15h"}}