1. [3x loud volume] 18W high volume, 76mm large-sized speaker, shocking and loud, connection distance of 30m-50m, clear and audible in any occasion, about 150 people indoor coverage, about 100 people outdoor, compact body, 200G ultra clear weight, no pressure to wear. 2. [Ultra long battery life] Full charge once, half a month's battery life, 2200MAH large capacity battery, continuous playback for about 25 hours, battery level display, and clear usage at a glance. 3. [Wireless Bluetooth 5.3] Connecting Bluetooth can be used as a speaker, making the connection faster and more stable, with a wide range of uses. (If you need Bluetooth function, please choose a Bluetooth speaker to purchase) 4. [Multi mode support] FM mode/MP3 mode, supports TF card/USB drive, can play while amplifying sound, supports fast forward/rewind/recording mode, supports recording while amplifying sound, automatic storage, supports single track cycle/audio playback mode, supports AUX/USB playback, USB cable can be connected to the computer to download MP3 file storage. 5. [Suitable for multiple scenarios] Teacher teaching/tour guide explanation/mall promotion/multi person meeting training/yoga fitness exercise/home/outdoor use, etc. Wireless: Bluetooth 5.3 Output power: 8W Charging time: approximately 2 hours Product weight: 200g Usage time: approximately 25 hours Standby battery life: half a month Adjustment method: Button adjustment Battery capacity: 2200MAH Charging voltage: DC 5V Input sensitivity: 600mv External audio source: 3.5mm audio cable input Colour:Black Material:ABS Package Contents: 1 * Amplifier 1 * Charging cable 1 * Belt 1 * Wired microphone 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 picture a little different from the real thing. The measurement allowed error is +/- 1-3cm.