Package List: 1 x Handle 1 x Host 11 x Functional Heads 4 x Functional Head Rubber Sleeve 14 x Rubber Rings 1 x English Instruction 1 x Plug 1 x Cloth Bag 1 x Cloth Bag Strap Specification: Item Type: ED Shockwave Massage Machine Material: Stainless steel Voltage: 100-240V Energy Gear: 25 Frequency Gear: 16 Host Size: Approx. 20 x 14 x 6cm / 7.87 x 5.51 x 2.36in Handle Size: Approx. 18 x 4.5 x 4.5cm / 7.09 x 1.77 x 1.77in Shockwave Effects: 1. Cells: enhance the permeability of cell membranes by improving ion channel activity, promoting cell division. 2. Blood vessels in tendons and muscles: improve blood circulation, increase growth factor B1, and enhance mitosis of osteoblasts. 3. Nitrogen oxide system: accelerate bone remodeling and healing. 4. Improve microcirculation and metabolism 5. Promote the dissolution of calcified fibroblasts. 6. Promote the synthesis of collagen. 7. Reduce tissue tension. 8. Analgesic effect. 9. (ED) treatment