Bone conduction speaker, a DIY sound experience. Place it on different surfaces such as a plastic storage box, glass, or wooden desk to deliver various sound effects. Features an advanced BT 5.0 chip supporting BT connection and True Wireless Stereo. Quality sound effect, up to 115dB powerful sound volume, full bass and loud treble. Built-in 400mAh lithium battery, up to 6 hours of playing time after 1 hour fully charged. Mini and compact size, convenient to carry and perfect decoration