• plastic, electronic components
• Horn speaker--it can the ' ability of listening and speech, very useful and convenient,voice amplifier
• Portable voice changer--this voice amplifier is lightweight and portable and anti-slip, very convenient to hold and carry,sound- changing loudspeaker
• Trumpet changer --the size is just right, the grasp is stronger, convenient and safe for playing,voice change speaker
• Trumpet playthings--the loud-speaker is widely used for stage performances, accompaniment singing, and teaching,trumpet
• Sound changer--unique modeling design and bright color make loud-speaker more attractive and adorable, loud-speaker