... , speaker box, woofers,, home theater speaker, bomb speaker, woofers, ceiling speakers, megaphone, pa speaker, mini animal speaker, mp3 speakers, speaker ... , but also easy to carry.It has built-in rechargeable lithium battery,a power management and battery protection cirecuit,and ... but also easy to carry.It has built-in rechargeable lithium battery,a power management and battery protection cirecuit,and ...