Rechargeable design: This 3-in-1 back massager features a powerful rechargeable battery that fully charges in just 2.5 hours and provides up to 4 hours of continuous use.【3-in-1 Multifunctional Lumbar Support】A smart design that combines a lumbar cushion, backrest, and gentle vibration massage. This lumbar cushion contributes to your daily comfort, whether you use it as lumbar support in bed, as a back cushion in a chair, or as a portable back massager for travel.【Adjustable Heat/Vibration Modes】Features adjustable heat and vibration modes, allowing you to choose your ideal comfort level. Perfect for daily lumbar relaxation after prolonged sitting. Ideal as lumbar support in recliners, car seats, or office chairs.【Memory Foam for Long-lasting Comfort】Made of high-density memory foam, it supports the contours of the lower back, adapts to the body's curves, and ensures ergonomic stability. The breathable fabric keeps you cool and comfortable, perfect for all-day lumbar support in bed, a chair, or a recliner. Portable design for all spaces: This lightweight and compact lumbar cushion is suitable for use in the car, office, or home, providing instant back support anytime, anywhere. Enjoy the soft, supportive feel that balances the spine and offers daily comfort.