The FL-502 Massage Massager for Lower Back Pain is specifically built to deliver targeted therapeutic relief to strained lumbar muscles. Produced in FENLI’s ISO9001-certified 4,000-square-meter factory, each unit incorporates high-torque pure-copper motors and four specialized 3D kneading nodes that mirror professional lumbar massage techniques. The integrated PTC heating system maintains a soothing 42°C temperature to boost local blood flow and ease muscle spasms. Every FL-502 undergoes 100% full-line quality inspection, including load testing, thermal calibration, and safety verification. Certified with CE, RoHS, and FCC standards, FENLI provides global clients with customized OEM manufacturing, private label packaging, and fast export delivery.