WHO Benefits from this TENS + EMS 2 in 1 Unit? 1. For those suffering from muscle, chronic, nerve, and even some acute pain, TENS is a drug-free alternative to relieve pain & tension. 2. For those who want muscle toning & firmness, the EMS Modes on this device stimulate muscles and improve muscle performance. 3. For those who travel, are sedentary for long periods of time, or need to enhance their blood circulation, it helps with local blood circulation in the muscles of lower extremities About the product EASY to USE: 10 intensity levels in each channel. Dual channels controlling 2 pads separately allow simultaneous 4 Electrode Pads application use. You can select 16 TENS or EMS Auto modes. 8 pcs High-Quality Electrode Pads are included and Replacement pads.This 2 in 1 device is fully automatic – just choose one of 16 modes and preferred intensity, and go! Built-in timer from 10 to 60 minutes, default timer: 20 minutes. When time is due, it can shut off automatically. Handheld and Portable: Compact in size, it is portable and can travel with you anywhere you’d like. Built-in rechargeable Lithium can last for up to 10 hours of use and can be connected to a wall charger or computer USB port. Easy to READ: It is easy to adjust massage mode, intensity and time control with the Large Back-light LCD screen which has an auto-off function. Package Contents: 1.Electric Tens Unit Massager x 1 2.2-port Electrode Wire x 2 3.Large Reusable Pads x 2 pair 4.Small Reusable Pads x 2 pair 5.USB Charging Cable x 1 6.Human acupoint map x 1 7.User Manual x 1 (Kindly Note: Before first use, please read user manual carefully.)