It can emit alarm sound, whistle sound, with functions of sound reinforcement, recording, playback, lighting, volume adjustment and so on. It has the advantages of simple operation, high power, clear and loud sound quality, stable performance, good frequency characteristics and low noise.
Operating voltage:DC7.2-9V
Charging time:4-5 hours
Charger:DC 10V/500mA
Lighting maximum power:0.5W(LED)
Harmonic distortion rate of loudspeaker:≤15%
Battery life: Continuous usage20-25 hours (shouting)
In the absence of strong electromagnetic interference environment, in theWithin 2-4 cm distance, the speaker's mouth is pointed at the loudspeaker. The amplification content should be clear and legible, without obvious noise and electrical noise (which should be reflected in the test report).
High temperature test:（After 40 plusmn; 2 2h, no power on), the function of voice detection should be normal within 15 minutes.