Specification: Item Type: Voice Amplifier_x000D_Material: ABS_x000D_Battery: 18650 Lithium Battery (2200mah) (Shipped with Built-In Battery)_x000D_Bluetooth: With Bluetooth Function_x000D_Memory Card Slot: Shipped Without Memory Card Features: 1Powerful Amplification: The mini voice amplifier has up to 10W output power, providing excellent sound quality and volume. 2Portable Design: Voice amplifier is compact and lightweight, easy to carry around, more convenient to use in outdoor activities. 3Multifunctional Speaker: Voice amplifier supports plug in card to play music, realizing multiple ways of sound entertainment experience. 4Rechargeable: Bluetooth voice amplifier adopts rechargeable design, long life, no need to replace the battery frequently. 5Applicable People: Mini voice amplifier is convenient for teachers and guides to use in outdoor or large scale scenes to improve the sound transmission effect. PackageList: 1 x Amplifier 1 xMicrophoneHeadset 1 x Charging Cable 1 x Waist Belt