| megaphone/Mutifunctional megaphone/megaphone supplier/megaphone factory/megaphone exporterSiren High Power/Siren/Whistle Megaphone/Amplifier YMH-140:1).power sourece: 12VDC(10*UM-1)2). Max Output:110dB/1M3).Current Consumption:2A Max4).Service Lifetime of Siren:15h(Until 100dB/1M Output)5).Two Tone:(1)Siren (2)talk(3)Whistle6).Material:ABS Plastic and Aluminum7).Color: Grey8).Size:355*355*520mm9).Net Weight(Without Battery):3100g10).Transmission Distance:2500m | 
