The experts at E-Stim Systems offer the 2B PRO PACK:
According to the E-Stim Systems website,
“We have taken our highly popular digital electrostim power box the 2B, and added a set of advanced accessories, designed with the experienced or advanced user in mind.”
2b Pro Pack information here.
Bonus for Metalbond readers:
Use code “METALBOND” to save 10 percent on your order*
*Offer is good for one time only