US Warehouse - FREE FAST Shipping in USA Product Description: Multi Preprogrammed Massage Modes: 24 modes created by professionals, using body simulation technology, bionic technology, bio-electric technology and intelligent microcomputer control technology to penetrate muscle groups deeper than and more effectively. Adjustable Timer Intensity: The timer allows you to set a time of between 10-60 minutes, with the default set to 20 minutes. Twenty levels of adjustable intensity mean you?ll easily find one that suits your needs. Dual Output Design for Multi-person Use: Simultaneous dual output design allows use by two persons or for use in two different body areas. Use "+" and "-" buttons to increase/decrease intensity of the selected mode. Built-in Rechargeable Lithium Battery: Provides up to 10 hours of continuous use and can be connected to a wall socket or USB outlet to charge, meaning you never need to worry about treatment interruption because of dead AA batteries again. A battery level indicator reminds you when charging is needed. Portable Pocket-sized Pain Relief: Enjoy the benefits of total body relaxation, anytime, anywhere! Use it for your back, knees, shoulders, ankles, wrists and elbows, and make this the most powerful weapon in your fight against chronic pain. Use for Body Power Source Battery Powered Material Aluminum Item Weight 1.92 ounces Note: 1. Please turn off the device before you touch the pads. 2. Not suitable for pregnant women or heart disease, epileptic and hypertension patients, and not safe for people with pacemakers. 3. In many cases, this stimulation will deliver immediate pain relief. Pain relief varies by individual and by the type of pain you are in. Universal Micro-USB USB cable information AC:100-240V DC:5V/0.5A 1A 1.5A 2A USB to micro-usb cable. TENKER TENS can be connected to a wall socket or USB outlet to charge. Lock Screen Lock/unlock: long press the center button for 3 seconds. Short press the?Center" button to switch between the sub-modes under 1 main mode. Intensity Adjustment The tens massager has a protective function to avoid shock. Only could we adjust the intensity under the following condition: 1. Electric wire connected well. 2. The pair of pads pasted above the massage area well. FAQ: Q1. How do I choose a replacement pads? A: The TENKER tens Compatible with All Standard 2mm Pigtail Electrode Pads, you could also buy our nursal tens pads here: B0925HT71K Q2. Why intensity can't be adjusted or turn on the device but feel nothing? A: The upgraded model tens massager has a protective function to avoid shock. Before adjusting the intensity, please make sure the lead wire is connected with the port and the pair of pads are pasted above the massage ares well, or we can't adjust intensity successfully. Q3. Why only could use the first 1-4 modes? A: Press the 'M' button to switch between 6 main modes, press the 'Center button' to choose within built-in 4 modes of each main mode. Q4. The tens unit muscle stimulator does not work? A: Please follow the below steps to test your tens, Press the 'M' to switch between 6 main modes. Press center button to choose within the built-in 4 modes." Press '-/+' to adjust the intensity. (only the port connected well and pads pasted on your body, could you adjust the intensity) Thank You for Shopping!