open ended experiments comprehensive experimental device

{"cid":"91224892","title":"Motor and Transformer Training Device with Three-phase Four-wire Power Supply and Leakage Protection for Open-ended Experiments","imgUrl":"https:\/\/img.chinax.com\/nimg\/9d\/f1\/21e33b3926f7a457c25d4fd72629-200x200-1.jpg","attrs":[]}

{"cid":"91223065","title":"797Audio D501 High-End USB Cardioid Recording Condenser Microphone Noise Cancelling Light-weight Portable","imgUrl":"https:\/\/img.chinax.com\/nimg\/34\/96\/c59e159247af6946e67d28bfc091-200x200-1.jpg","attrs":{"Price":"$60.00\/sets 1-499 sets","Brand Name":"797AUDIO","Model Number":"D501","Private Mold":"Yes","Style":"Handheld Microphone, USB Microphone, Desktop, Shock Mount, wired microphone","Communication":"Wired","Use":"COMPUTER MICROPHONE, Conference Microphone, Karaoke Microphone, Church, Stage Performance, INTERVIEW, Speech, Recording, SINGING, Teaching, Portable Audio Player, communication, broadcasting, Kids, Gaming","Place of Origin":"Beijing, China","Material":"Metal, Plastic","Function":"Noise Cancelling, Light-weight, PORTABLE, Condenser Microphone","Polar Pattern":"Cardioid, Cardioid","Type":"Condenser Microphone, USB digital output","Frequency Response Rate":"20Hz-20KHz","Maximum SPL":"127dB(THD1%,1kHz)","Sensitivity":"-17dBFS\/Pa(1kHz,Gain 0dB)","Connector Type":"Type C, 3.5mm Headphone Plug","Product name":"D501 NEW Professional USB Condenser Microphone","Brand":"797Audio","Model No.":"D501","Frequency Range":"20 Hz - 20khz","Sampling Rate":"48kHz,16bit","Sensitivity(dB)":"-17dBFS\/Pa(1kHz,Gain 0dB)","Microphone Gain Range":"-14dB ~ +21dB","Max.SPL(dB)":"127dB(THD1%,1kHz)"}}

{"cid":"91192910","title":"Diesel Fuel Oil Oxygen Bomb Calorimeter Strong Anti Interference For Lab","imgUrl":"https:\/\/img.chinax.com\/nimg\/43\/32\/c279927b7a3937c65a7e56d520f9-200x200-1.jpg","attrs":{"Price":"Negotiable","Brand Name":"BAXIT","Model Number":"ZDHW-9B","Minimum Order Quantity":"1","Delivery Time":"5-8 working day","Place of Origin":"CHINA","Payment Terms":"L\/C, D\/A, D\/P, T\/T, Western Union, ","Supply Ability":"1000UNIT \/30DAYS","Packaging Details":"Wooden box","Usage":"Measuring the calorific power","Energy Measurement Range":"0~50000J","External water tank capacity":"40L","Inner water tank capacity":"2.1L","Voltage":"AC220V 50Hz","Single calorie measurement time":"15 minutes"}}