Developed especially for the Electro Stimulation Connoisseur the ElectraStim SensaVox has stacks of features and un-rivaled finely controllable POWER!! This unit has two independently controllable outputs allowing you to use two bi-polar accessories at the same time or you can share with your partner. Built-in programs, Audio input features, 7-segment LED Displays, Digital Power Control, Boost Feature. Key features include: High Intensity "Truly Isolated" Dual Channel Output, Optimal Multi-Turn Digital Power Control, Output Boost Feature, Economy Power Saving Mode for Prolonged Battery Life, Multiple Modifiable Stimulation Programs, SensaVox Audio Input, Safety Features, Low Battery Warning, and Durable Control Panel. Items are backed by a 12 month warranty. When you buy an ElectraStim stimulator you can also extend the warranty to 3 years by registering your purchase with the vendor (within 4 weeks of purchase).