Thank you for viewing. I am selling this item because I have multiple units at home and am not using this one. Although it's from a few years ago, it is unused and I believe it is in good condition. (I took it out of the box once to check its operation.) I think this is a very easy-to-use stretching aid. Please consider it. 【Specifications】 Power Source: Rechargeable Charging Time: Approximately 3.5 hours (for a full charge) Number of Recharge Cycles: Approximately 350 times Battery Life: Approximately 180 minutes Vibration Frequency: Approximately 4000 times / minute Rated Operating Time: Approximately 10 minutes Operating Environment Temperature: 10℃ 〜35℃, 30%RH ～ 85%RH Weight Capacity: Approximately 100kg Body Dimensions: W266 × D232 × H113 mm Weight: Approximately 660g (body only) Materials: Polyurethane, PU foam, ABS Accessories: AC adapter, USB cable