The QUELL Wearable Pain Relief NeuroMetrix QE-SYR is a TENS Unit designed for physical medicine and rehabilitation purposes. This wearable device has 2 channels and is manufactured by the brand Quell. Originating from China, this untested open box product offers a unique and innovative approach to pain relief. With its wearable design, this TENS unit provides a convenient and hands-free option for managing pain and muscle stimulation.