... , Headset Microphone, Lithium Battery and Cute Surface DesignApplicationThis digital amplifier is ideal for entertainment, outdoor activities, teaching, ... and elegant design, durable ABS constructionFunction:1. Multifunctional digital amplifier all in one with microphone, amplifier and ... 4 V Material: ABS Product Dimension: 110mm x 105mm x 45mm Content: Master Amplifier 1PCHeadset Microphone 1 pcLithium ...