The vibrator is driven by motor, transmitted by flexible shaft, speed increased through planet structure, then gain high frequent vibration. It is suitable for concrete cast-in-site of various bridges, tunnels building foundation, precast units, beams, and columns in remote districts. Power: 1.1 kw Voltage: 380v / 220v Frequecy: 50Hz Rotary speed: 2840 rpm Packing size: 44.5*25.5*33cm Weight: : 17kg