Voice amplifier with multiple features and a built-in wireless headset. Good sound adjustment options, AUX audio input, and covers a large area up to 1000 m2. 
Comes with a wireless headset. Frequency - 2.4 GHz.
  
Operating battery time:           6-10 hours
Recharging time:                       2-3 hours
Range:                                        Approximately 1000 kvadratmeter square                                                                meters (open surface)
Maximum output power:        18W
Weight:                                       218 gram
Measures:                                  98mm X 88mm X 43mm
Wireless Headset, range
from the unit:                            about 15 meters, depending on the surface

Voice amplifier with multiple features . Good sound adjustment options, AUX audio input, and covers a large area up to 1000 m2.
 

Operating battery time:          6-10 hours
Recharging time:                       3-4 hours
Range:                                        Approximately 1000-2000 kvadratmeter square                                                      meters (open surface)
Maximum output power:        18W
Weight:                                       218 gram
Measures:                                  98mm X 88mm X 43mm