If you're are a teacher,guide, saleperson, presenter who need a loudspeaker with Loud sound and clear tone quality, BQ-850 Multifunctional louderspeaker is your top choice.  
Equipped with a headset microphone, working with the loudspeaker.
Compatible with almost devices as a louder speaker, with FM radio, TF socket, louderspeaker perform the Loud sound and clear tone quality.

Specifications: 
Loud sound and clear tone quality. 
Equipped with a headset microphone, working with the loudspeaker.
Compatible with almost devices as a louder speaker, such as for Smarts Phones, Tablet PC,  Notebook,  Laptop,  ect.
Reverb Control design  makes your voice sound stereo.
Multi-functional product which has TF socket to play audio files from micro SD memory card.
Used as a FM radio receiver, convenient to receive different channels.
2.2in display screen shows the channel frequency.
With an earphone socket, allowing you enjoy the sound without disturbing others. 
Comes with adjustable waistband, one size fits most people. 
Buckle design allows to be hanged in different ways as you like.
Suitable for teaching, guided tours, promotions, training, fitness, singing machine, radio, music, storytelling, ect.
Note: 18650 rechargeable battery (not included), you had better purchase for using. 

Specifications:
Brand: BOAS 
Model: BQ-850
Type: Loudspeaker
Input signal: Microphones (-20db 60ohm)
Charge Voltage: DC5V/500mA
Output power: RMS5W
Play Time: 5 hours
Sensitivity: -53bv/108MHz
Radio Frequency: 90Hz-18KHz
Output impedance: 3ohm
Color:Black
Loudspeaker Size: Approx. 12.8 * 9.5 * 3.5cm/ 5.04 * 3.74 * 1.38in
Loudspeaker weight: Approx. 235g/ 8.29oz
Package size: Approx.20.8 * 15.8 * 5.2cm/ 8.19 * 6.22 * 2.05in                      
Package weight: Approx. 453g/ 15.98oz

Package List: 
1 * Voice Amplifier 
1 * Headset Microphone 
1 * Waistband
1 * USB Cable 
1 * Adapter (EU Plug) 
1 * User Manual (English)