Dual Independent Channel - TENS Electro-stimulator has two independent channels, so you can set separate modes and intensities for Channel A and Channel B, or even use it for two people at the same time.<br> Enhanced TENS electrode - which can offer much better self-adhesive performance and easy cleaning after 45 uses for a longer life.<br> Operating principle - It effectively relieves pain after childbirth by sending comfortable pulses to the skin, stimulating nerve fibers in the corresponding area and blocking pain signals transmitted to the brain.<br> Large LCD screen - This TENS electrotherapy unit features an LCD screen with backlighting and enlarged symbols and buttons to simplify reading and operation. You can set the working time of the electrical stimulation device to 10-60 minutes, which is sufficient for your massage needs.<br> Long-Lasting Rechargeable Battery - Features a built-in lithium battery that takes just 2 hours to fully charge and lasts for 12 days (30 minutes of use per day). Portable, lightweight and compact design, perfect for travel and fatigue relief.