1. Product Name: Low Frequency Massgaer Model: SM-502 Place of origin: China 2. Features and Functions: ① 2 ways- 4pads, that can supply for two people use at one time. ② Can release your pain, muscles etc. ③ Can as a gift to give your families, friends and so on. ④ Other usages 3. Specifications: ①. 1.voltage: alkaline 3.0V(2 piece 7# batteries ) ②. Frequency: 2-100Hz ③. Output: maximum: 20mA ④. Size of main machine: 100mm*60mm*15mm ⑤. Size of pad: 78mm*51mm ⑥. Size of outer packing: 215mm*160mm*49mm ⑦. Size of pad holder: 85mm*60mm ⑧. Weight: 321.5g 4. Accessories: ①. 1 piece main machine ②. 4 piece adhesive pads ③. 2 pieces 7# batteries ④. 1 piece instruction leaflet ⑤. 2 pieces cord ⑥. 2 piece pad holder