What's the difference between this machine and the one that sells for over $200 in Amazon?

I have the 7000 unit and have worked with this one. Both are great. A good unit should not cost at max more than $60 if it has a few extra accessories.

What size are the lead wire connectors, the pieces that connect the 2 sets of wires together? Its usually in mm?

I searched the pamphlet that came with the TENS unit, but I could not find the measurement. I am a nurse and see that the wire end is 1 mm and the electrode lead receiver is 4mm.

How much Amperage power does it have?

Pulse Amplitude: Adjustable, 0-100 mA peak into 500 ohm load •Wave Form: Asymmetrical Bi-Phasic Square Pulse •Size: 10.1cm(L) x 6.1cm(W) x 2.45cm(H) •Weight: 150 grams with battery. •Pulse Rate: Adjustable, from 2 to 150 Hz, 1Hz/Step •Pulse Width: Adjustable, from 50 to 300 microseconds, 10μs/step •Modes: B(Burst), N(Normal), M(Modulation), SD1(Strength Duration), SD2, P(P1-12) •Timer: Adjustable, from 5 to 60 minutes or Continuous.

I have to wear the tens unit in the gym. Is this tens unit smaller enough to put in your pocket or a bag around your waist?

Hello, thank you for your questions and the device dim. 2.4x4x1 it should be fit your pocket or bag. I hope you enjoy this device in the gym:)

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Description

⚡ Zap pain, not your lifestyle — relief that keeps up with you!

COMPLETE ON THE GO KIT - Includes 8 electrodes, lead wires, battery, and a sleek carrying case for pain relief anytime, anywhere.
DUAL CHANNEL PRECISION - Target multiple pain zones simultaneously with 2 independent channels for personalized relief.
VERSATILE THERAPY MODES - Choose from 5 TENS modes and 12 preset programs tailored for chronic and acute pain management.
PREMIUM JAPANESE GEL PADS - Experience superior conductivity and skin comfort with biocompatible SEKISUI gel, perfect even for sensitive skin.
CLINICALLY APPROVED SAFE - 510K approved, drug-free pain relief device trusted by professionals, no prescription needed.

The iSTIM EV-820 is a professional-grade, dual-channel digital TENS unit featuring 5 therapy modes and 12 preset programs designed for effective pain management and muscle rehabilitation. Equipped with premium Japanese SEKISUI gel electrode pads, it ensures optimal conductivity and comfort. Clinically approved and drug-free, this portable device offers safe, long-lasting relief for back pain, arthritis, and muscle tension, making it an essential tool for proactive wellness.

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