Feature: 1. Effectively reduces muscle tension through high frequency vibration. 2. Suitable for hand weakness or reduced sensation; vibration may help stimulate sensory nerves and support hand rehabilitation. 3. Rechargeable and portable, can be used anytime and anywhere without being restricted by wires. 4. 1200mAh battery capacity, provides approximately 120 minutes of use; fully charges in about 120 minutes. 5. Intended use: suitable for individuals with limited grasping ability; designed for those with some grip strength but reduced strength; suitable for individuals with wrist drop and limited grip function. Specification: Item Type: Finger Rehabilitation Tool Material: ABS + Cloth Plug: US Optional Type: Finger Type Massage Ball, Wrist Type Massage Ball Battery Capacity: 1200mAh, provides approximately 120 minutes of use; fully charges in about 120 minutes Ball Diameter: Approx. 9.5cm / 3.7in Ball Weight: 295g / 10.4oz (approx.) Input Voltage: 110-240V Output Voltage: 7.4V Time Setting: 10 minutes Battery Life: About 120 minutes Charger Line Length: Approx. 80cm / 31.5in Gear: 4 adjustable levels Recommended Use: 10 minutes per session, up to three times daily Package List: 1 x Massage Ball 1 x Finger Sleeve 1 x Charger