Wireless 4500mAh Microphone Teacher 15 Advantages Voice mic Amplifier Loudspeaker lapel Speaker Display with FM card Repeat USB flash drive interface playback

[Powerful Sound]Small-sized , 8W output is clear and noise-free, enough to cover a room of 30-100 people. Amplify your voice and your throat.[Easy to Carry]This portable speaker is small and light, you can use the detachable clip to fix it on your pocket or belt, or you can tie it around your neck or hang it on a belt around your waist.[Rechargeable Amplifier]This amplifier has a built-in 4500mAh lithium batttery. 40 hours  playback time.[Lightweight power pack]. Amplifier This microphone and speaker set is a portable public address system. You can take it to multiple such as classrooms, bingo phones and outdoors.[Support music playback]This amplifier can play TF (-SD card) card and U disk. You can repeat a single song, loop all music, and switch . Colour:BlackMaterial:plastic Package Contents:1 x Voice Speaker1 x Headset1 x USB Charger Cable Only the above package content, other 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.Description1. Material: ABS, electronic components2. Function: insert card, radio, voice prompt, call function3. Channel: 2.14. Number of speakers: 15.Effective distance: 10 meters6. Operation mode: button7. Play format: MP3, WMA, WAV, APE8. Support format: TF card9. Frequency response: 90Hz-12 Khz10. Signal to noise ratio: 65dB11. Loudspeaker resistance group: 2 ohms12. Output power: 8W13. Built-in battery: 4500mAh lithium battery 3.7V14. Charging voltage: DC 5V15. Charging time: 1-2 hours16. Use time: about 40 hours17. Transmitter battery (wireless model): button battery (delivered with battery)18. Multifunctional loudspeaker, digital clock design, can also be used as an alarm clock19. Two styles, two ways of use, you can choose freely20. The smart display shows the remaining battery power and the working status is clear at a glance21. Dimensions: 7.5 x 11.5 x 3.1 cm22. Product weight: about 230 grams