1、Wireless Freedom: With wireless design, there is no need to be bound to a wired microphone, and you can walk freely without distance restrictions. 2、High Sound Quality Transmission: Wireless loudspeaker has good audio transmission, ensuring clear and far reaching acoustics. 3、Long Term Use: The loudspeaker has a built in rechargeable battery, and the charging time is about 4‑6 hours, without frequent charging. 4、Easy to Carry: The small and lightweight design of the wireless voice amplifier is very easy for teachers or tour guides to carry around. 5、Multiple Uses: Amplifier is not only suitable for classroom teaching and guided tours, but also ideal for training and conferences. Item Type: Voice Amplifier Material: ABS Charging Time: 4-6 Hours Use Time: > = 15H Rated Output Power: 4W Battery Type: Li Ion Battery Battery Model: DC5V Battery Capacity: 1000mAh 1 x Voice Amplifier 1 x Headset Microphone 1 x Waist Buckle 1 x USB Charging Cable 1 x Shoulder Strap 1 x Manual