Pain and Muscle Relief. TENS can help reduce your pain and muscle spasms caused by many conditions, including: neck pain, back pain, knee pain, arthritis, period pain and sports injuries etc. EMS brings elicitation of your muscle contraction using electrical impulses and activates the muscles to assist in the increase of strength and endurance as a rehab and strength training tool. 24 Modes and Upgraded Time Control. TENS machine provides 24 modes and is upgraded to include steady wave modes. The upgraded time control offers a flexible time setting from 10 to 90 minutes as well as an increased time setting of Continuous for uninterrupted usage. Bigger Battery, 2X Battery Life. It has a large 300mAh rechargeable lithium battery to last up to 40h standby time, which beats other TENS with 180mAh by twenty hours. No worries about usage interruption for dead AA batteries or low power any more. (This TENS can be connected to your wall charger, power bank or laptop with our included Type-C to USB cable) No More Mess of Cables. A belt clip is also provided to keep your TENS secured on your waist and access it quickly when you need it. No more unsightly mess of tangled cables with included cable ties. W​hat You Receive​. 1 x AUVON TENS Device, 8 x TENS Unit Pads (2 x 2”), 2 x Lead Wires (with Cable Ties), 1 x Type-C to USB Cable, 1 x User Manual, 1 x Dust-Proof Bag, 1 x Belt Clip, Our 24-month Worry-free Services and Lifetime Technical Support.