Make your sounds more louder.</br>Change your voice from male to female or female to male freely.</br>It can change to 8 kinds of different voices: Male (3 types)?? Female (3 types)?? Robot?? and Original. Can work with MP3?? MP4?? cell phone?? and computer.</br>Suitable for teaching?? tour guiding?? sales promotion?? and speech?? etc.Low power consumption.</br>Two lithium batteries?? long battery life?? up to 8 hours?? charging low voltage protection function.</br></br>Product Description</br></br>Features:<br> Portable size.<br> Easy to operate.<br> Can make your sounds more louder.<br> Can change your voice from male to female or female to male freely.<br> It can change to 8 kinds of different voices: Male (3 types)?? Female (3 type