ultra thin multilayer piezo speaker

{"cid":"91219474","title":"Ultra Thin Ceramic Multilayer Piezo Speaker 300Hz - 20000Hz For Answer Back System","imgUrl":"https:\/\/img.silkroadsl.com\/nimg\/1b\/cd\/2cec0a188bba5c7d6eda3cb8072a-200x200-1.jpg","attrs":{"Brand Name":"AUDIOWELL","Model Number":"MT0006","Minimum Order Quantity":"20000","Delivery Time":"30 works days","Place of Origin":"China","Payment Terms":"T\/T","Sound pressure level":"80 dB","Resonant frequency range":"300~20000 Hz","Operating temperature":"-20\u2103 ~ +70 \u2103","Size":"30\u00d720\u00d72mm"}}