Commodity: Palm Percussion Massage Model: HY-1004 Packing: color box Specifications: (ctn measurement) 38*38*34 cm Rated Power: 15W Rated Voltage: 220V (or 110V) Frequency: 50Hz Rated Work Time: 30minutes Weight: 0.75kg Function: 1. Relive muscles tension and reduce stress. 2. Strong percussion action helps to ease discomfort and restore agility and flexibility, adjustable strap fits hand size. 3. Helps to stretch contracted tough muscles. 4. Promote blood circulation. 5. Easy-to-control intensity, for gentle to invigorating massage by slide switch. 6. Lightweight design allows easy carry and easy palm control, the special designed pinpoint of percussion, offers the central massaging effect, and makes the massaging more comfortable and relaxing.