in wall stereo volume control

{"title":"White Wall Rotary Knob Volume Control Impedance Matching For Ceiling Speakers Bluetooth Amplifier","imgUrl":"https:\/\/img.chinax.com\/nimg\/41\/74\/8c86fcc8d033ad66b77c98a1ef07-200x200-1.jpg","attrs":{"Price":"Negotiable","Brand Name":"Vistron Audio,support OEM\/ODM","Model Number":"IWA-225","Minimum Order Quantity":"300 pcs","Delivery Time":"35-45 days","Certification":"CE,ROHS,FCC,ETL,etc","Place of Origin":"China","Payment Terms":"T\/T, L\/C, Western Union, Paypal","Supply Ability":"80000 pcs per month","Packaging Details":"One piece amplifier in a giftbox, 6 pcs amp in a carton","Type":"Wall Plate Mount amplifier","Channel":"2 channel stereo amplifier","Power":"2X25W RMS 4ohm","Frequency Respone":"20-20K Hz","Class":"Class D Wall Plate volume control","BT version":"Bluetooth wall panel amplifier","Usage":"Custom installation amplifier","Inputs":"Bluetooth, 3.5mm","Color":"White","OEM":"Yes, custom design as requests"}}

{"title":"60W Mini PA System Amplifier Audio Class D Stereo Power Amplifier Black Color","imgUrl":"https:\/\/img.chinax.com\/nimg\/c6\/b4\/53ecc923ebc0379f7ecddba1e3a6-200x200-1.jpg","attrs":{"Price":"Negotiation","Brand Name":"GLSPA","Model Number":"GLS-A004","Minimum Order Quantity":"100pcs","Delivery Time":"20working days","Certification":"CE","Place of Origin":"China","Payment Terms":"T\/T, Western Union, MoneyGram","Supply Ability":"1000pcs\/month","Packaging Details":"1 piece\/box","material":"metal","color":"black","speaker output":"4\u03a9 or 8\u03a9","input type":"2 AUX input of RCA and 2 MIC\/Line input of phoenix","S\/N Ratio(Line)":"Higher than 85dB","THD":"Less than 0.5% at 1KHz, 1\/3 rated power","power supply":"~110V\/60Hz or ~230V\/50Hz","size":"230*115*56.5mm"}}

{"title":"Public address IP Network Adapter ( Wall Mount, with amplifier) Y-2002","imgUrl":"https:\/\/img.chinax.com\/nimg\/1b\/e3\/6afccf68833ef8a2d2bb24d47159-200x200-1.jpg","attrs":{"Price":"public address","Brand Name":"Younasi","Model Number":"Y-2002","Minimum Order Quantity":"1 set","Delivery Time":"15-25days public address","Place of Origin":"China","Packaging Details":"pa system","Payment Terms":"T\/T"}}