Round megaphone, speakers, smart sleep device, 31mm, 3W, bluetooth

31MM round internal magnetic speaker 4 ohm 3W Bluetooth speaker sleep instrument speaker voice smart home appliance speaker        Source factory!Our horn has a variety of specifications. Please confirm the size, parameters, materials and other data before placing the order so that we can accurately ship and provide you with better services. Thank you!       Own factories, maintain quality and quantity!Routine sampling speed is fast, please consult and order! In order to adapt to the EU's SGS and RoHS regulations, the company has fully implemented environmental protection speakers, that is, various electronic parts compliance with environmental protection regulations.It will be in line with international standards and take the lead to Europe and the United States.       Order reminder: The price of 1688 is for reference only. Please consult the customer service in detail in the actual price.