Scope of application: Suitable for factory, construction, traffic failure device. High-quality materials: Using high-quality materials, high temperature resistance, low temperature resistance temperature, long-term use. Stable performance: stable working performance, using professional design process and manufacturing to standard specifications. Siren: The siren uses a motor electric to drive the wind screw siren to make a sound, so it looks like an electric drill. Easy to install: fixed base installation, the air outlet can be adjusted up and down . Size: 10.2*8.6cm Packing List: 1 Piece Siren Working voltage: 12V/24V 110/220V Current: 2A 1.5A 0.12A Power: 40-50W Frequency: 50/60HZ Decibel: 110-115dB