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High powered portable Megaphone is equipped with a siren and a noise cancelling Microphone.
GM-101 capable of eliminating feedback and howling. It operates on 12 V, 8 Nos. 1.5 V 'C' Type um-2 dry cells and external 12 V D.C. car battery.
GM-20 has a voice range of 600 mts. in quite environment and 300 mts. in noisy areas. It can be shoulder slung or can be mounted on stand.
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