Note:This items is not a speaker .it is Bass Radiator.
This is a bass radiator for DIY Bluetooth speakers to enhance the bass effect, but the box must be a closed box to play the effect
Product name:4 inch bass radiator
Diameter 100 * 92mm, built-in type, built-in opening 83 * 83mm
Feature: rubber edge
Package:
4 inch bass radiator (not a speaker)