The InTENSity 7 is a member of one of the most popular, and best valued, digital TENS unit brands available on the market.Proven to be among the most durable and easy-to-use TENS units out there, it features a modernized and upgraded microprocessor which offers more precise and accurate adjustability and control of each electrotherapy parameter compared to similar entry-level electrotherapy devices.The device is great for users seeking a digital LCD display of treatment modes and parameters that is also equipped with physical pulse amplitude knobs for adjusting the intensity of the stimulation throughout each treatment session.A longtime over-the-counter and doctor-preferred choice for effective relief from acute and chronic pain, just like you will find at your local chiropractic or physical therapy clinic.Recommended For: Immediate relief of acute or chronic pain Relaxation of muscle spasms Increasing local blood circulation Immediate stimulation for post-surgical recovery Maintaining or increasing range of motion Post-workout recovery Product Features & Specs: Channels: Dual Channel, for use with 2 or 4 electrodes Pulse Amplitude: Adjustable, 0-100 mA peak into 500 ohm load each channel Wave Form: Asymmetrical Bi-Phasic Square Pulse Pulse Rate: 2 - 150 Hz (adjustable), 1Hz per step Pulse Width: 50 - 300 µs (adjustable), 10µs per step Timer: Adjustable in 5 minute increments from 5 - 60 minutes, or (C) continuous 5 Program Modes: Burst Mode (B): Burst rate - adjustable, 0.5 - 5 Hz; Pulse width - adjustable, 50 - 300 µs; Frequency fixed = 100 Hz Normal Mode (N): Pulse rate and pulse width are adjustable. Generates continuous stimulation based on setting value. Modulation Mode (M): Combination of pulse rate and pulse width modulation. Total cycle time = 1 second. Strength-Duration Mode (SD1): Consists of automatic modulation intensity and pulse width in 40% range. The intensity is always increasing, with the pulse width decreasing, and vice versa. Total cycle time = 10 seconds. Strength-Duration Mode (SD2): Consists of automatic modulation intensity and pulse width in 70% range. The intensity is always increasing, with the pulse width decreasing, and vice versa. Total cycle time = 10 seconds. Patient Compliance Meter: This unit can store up to 60 sets of operation records. Total recorded time is 999 hours. Low Battery Indicator: A low battery indicator will show up on the LCD screen when the battery power is low. Dimensions: 4" (L) x 2.4" (W) x 1" (H) Weight: 5.3 oz (includes battery) Power Source: 1x 9-volt Heavy Duty Battery Voltage: 0 - 50V (Load: 500 ohm) Comes with Safety Amplitude Cap FDA-Approved for Over-The-Counter Sale 1 Year Manufacturer Warranty Package Includes Everything Needed To Start Treatment Right Away: 1x InTENSity 7 Stimulator 1x Sturdy Metal Belt Clip 2x Sets of 45" Lead Wires (Part #: WW3005) 1x Pack of Four Self-Adhesive Reusable Electrode Pads (Part #: EP2020WC2-INTM) 1x 9V Battery (Part #: TA9050-I) Hard Plastic Carrying Case Quick Start Guide Instruction Manual