Check the listing for details. Bob Beck Device (V4) w/dial for intensity adjustment.. Condition: New. Listed at 48.00 USD. Bob Beck blood electrification Device (Version 4!) (Requires 3, 9v Batteries [NOT INCLUDED]) UPDATED VERSION 4 DESIGN: Precision dial for fine tuning power level intensity. These are not the prettiest devices but they're each tested on an Oscilloscope to precisely match the documented patent specs. Every device may vary with its components to ensure the proper specs are ALWAYS matched. Wire colors may also vary depending on supply availability. The sticky TENS pads can be reused up to 10 times each pair. I selected sticky pads because the cotton ball + salt water and strap isn't easy to manage. Through personal testing, In my opinion, this is the most comfortable design by far. Please research Bobs additional protocols as they pair very well with this device. Here's what you'll receive when you order. 1 Beck Device, with 2 alligator style clip connectors and 3 9v Battery connectors. (Alligator clip colors may vary) 2 pairs of sticky tens patches. (Please use them as directed, clean skin, no lotions, standard TENS type button connector patches) This package ships as a complete ready to use unit, Nothing else needed, no prep, no salt water cotton balls or uncomfortable straps. Enjoy! UPDATE: This device will also generate colloidal silver. (Silver wire not included) NOTE: Disconnect all 3 batteries when not in use as you can damage the unit and drain the batteries prematurely. Check out my SUPER DELUXE BEAST MODE VERSION HEREhttps://www.ebay.com/itm/125928081694