1. Smart Ducking Function, To Adjust Treble / Alto / Bass,7 Types Special Effect,Original-Sound Remove,Electronic Sound Setting2. Power Battery With 4000mah Capacity,Battery Life In 5hours For Normal Use3. Fit For Some Of Equipment,With Bluetooth (Cellphone, Pad Tv)4. Adiustable Volume5. Fit For Studio And LiveWireless Microphone Charging Time:2-3hBluetooth Parameters:BT5.0Wireless Microphone Distance:10-15mBluetooth Distance:10mSpeaker Parameters:4x8WProduct Battery Specification:7.4V/4000MAProduct Charging Time:3-6hProduct Play Time:3-4hCharging Parameters:5V/2AMain Functions:Bluetooth/TF Card, Listening To , Singing, Live Broadcasting, Recording , Voice Changing, Special Effects, Reverberation.Note:Different Batches May Have Differences In Product Appearance, Color, And Printed Characters, Which Will Not Affect The UseColour:As ShownMaterial:ABS+PlasticSize:About 325x143x84mmPackage Contents:1 * 3.5 Accompaniment Cable1 * 3.5 Live Broadcast Cable1 * Charging Cable2 * Wireless Microphone1 * Receiver1 * Earphone1 * Strap1 * English ManualOnly 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.