Xiaomi QBH4261GL portable/party speaker Stereo portable speaker Black 30 WDynamic sound Featuring a large mesh area design, the speaker delivers more transparent sound and balanced audio. No matter where it's placed, you'll be amazed by rich and powerful sounds that defy its compact size. Exclusive woofer boost mode Equipped with dual large size passive woofer radiators on both sides, the speaker delivers fuller and richer bass for dynamic, natural, and energetic percussion sounds. 12 hour ultra long battery life