Unique Colorful in shape and appearance, Light weight design. Rechargeable and replaceable 2200 mAh lithium . Standby time can lasts 18~22 hours, more than 12 hours of continuous use after a full charge. Professionally amplifying sound, loud, clear, low feedback. Comfortable and convenient for Teachers, Coaches, Tour Guides, Presentations . Compatible with all media devices with 3.5mm AUX port as SPEAKER ; support TF Card (Not more than 32GB) MUSIC PLAYER, can directly play MP3,WMA,WAV audio. FM RADIO, auto-search and save radio stations. Additional 2200 mAh POWERBANK function. Effective Audio Power 5W Colour:Black Material:ABS Size:117 x 85 x 39mm Package Contents: 1 x Bluetooth 1 x USB cable 1 x belt 1 x wired headset Only the above package content, other products are not included. Note: Light reflection and different displays may cause the color of the item in the a little different from the real thing. The measurement allowed error is +/- 1-3cm.