Power: 8WBattry capacity: 4600mAhCharging time: 4hWorking time: 2-3 hoursLife time: up to 15 hoursPlayback mode: support USB flash drive playback and TF card playbackTips:It is wired or wireless version.Except for the microphone connection way, other functions are all the same.HOW TO USE:1. Place the microphone in front of your mouth to obtain the maximum amplification effect.2. Do not whistle: keep a certain distance between the microphone and the speaker, and preferably facing each other.3. Put on a headset, hang the amplifier speaker on your waist, then turn it on, and finally gradually increase the volume as needed.Colour:WhiteMaterial:plasticSpecification:A:WirelessPackage Contents:1 x Voice amplifier1 x Headset microphone1 x USB cable1 x Waist Belt1 x Wireless ReceiverOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.