LK-120 is designed to provide effective warning in applications where there is no power supply. As lightweight, it can be easily transported to remote locations and folds up to a small size for ease of handling Sound Rating: 120±2dB (A) @1M. Output Frequency: 600±20Hz, Effective Range: 1.5km diameter. Net Weight: 9Kg. Carton Size: 45 x 37 x 58CM.