Advanteq 2000 Tens Unit With Recharge Package. Amrex Advanteq 2000 TENS UnitThe Amrex AdvanTeq 2000 is a high quality, low cost, portable TENS device that features an attractive new package design. It provides two independent output channels, modulated, normal and burst output modes, as well as adjustable pulse width and pulse duration. Manufactured from the highest quality components and materials - backed by a two-year warranty and over 65 years of electrotherapy experience. Includes 2 rechargeable batteries, battery recharger and carrying case.