[Power Pulse TENS+EMS Tens Unit,--PREES TWICE "ON" TO GET PULSE START] TENS-BLACK-PADS device combines 2 therapies in 1 device, in which TENS provides safe, non-invasive, free methods of pain relief used by doctors and physical therapists for years. EMS brings elicitation of 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. It's alternately massage you. Relieve fatigue and pain! [With Powerful Rechargeable Battery] When fully charging , It can be used up to 30 days if you use it one hour per day . It can be connected to wall charger, power bank or USB outlet to charge. Don't worries about treatment interruption because of dead AA batteries again. With a battery level indicator reminds you charge timely. It's a ems microcurrent mini massage device. [Multi-Functional with 6 Modes] TNES-BLACK-PADS Units with 6 Modes and 10 levels of intensity,The streamlined procedure has selected the most effective 6 modes. You can choose the mode of treatment you need. Usually you choose a mode that suits you, and then adjust the intensity that suits you. It is recommended to use different modes of treatment alternately!It is beneficial to treat and relieve fatigue. [Pain Relief Device,Non-Invasive, Choice] TENS ems muscle stimulator massager is Safe, All- Natural for Pain Management. we will help you to relief pain Or Just Relax,Due to the different sensitivities of various parts of the body, we suggest you use it on your back for the first time. [Extra 2pcs Individually Packaged Tens Pads] Each replacement pad is packaged in an individual airtight bag, which is easy to use and store. You only need to open one at a time, and average a pad can be used for 2 months. When you need more replacement pads, you can come to us, we can provide.