Commodity: Massage Hammer Model: HY-1001 Packing: color box Specifications: (ctn measurement) 57*42*46 cm Rated Power: 28W Rated Voltage: 220V Frequency: 50-60Hz Rated Work Time: 30minutes Weight: 1.1kg Function: 1. Relieve fatigue and aches from exercise and mental stress. 2. Relax the muscles and ease the discomfort. 3. Promote blood circulation. 4. Adjust blood balance in body. 5. Strengthen immunity of body.