Cast Aluminium Siren, with handle on top of siren to select and alter the sound output. Sound output: 120dB(A) at 1m Sound Frequency: 500 Hz APP. Range: 2000m (2 KM) in still air open field Motor: Sealed gearbox crank handle with ratchet Weight: Approx. 9-12kg Packing Dimensions: 560 X 360 X 450 mm