| 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:2500mProduct Advavtage:1.Friendly material:our product is made of environmental friendly material.2.Energy saving:our product averagely uses 1/3 of the energy required by our competitor's product.3.Light weight:our product is on average 30% lightweight than our competitor's products.Product Specification:1.Power indicator included to prevent trouble while speaking2.Comes with Alarm and Siren ability | 
