A revolution in electro stimulation technology the ElectraStim Flick Duo Stimulator Pack not only has seven built-in programs including escalating patterns but is also able to stimulate in rhythm with "Flicking" movements of the control unit! Whether you simply want to add your own stimulation "beat" or want to stimulate in direct sympathy with your own wrist movements during masturbation, this patent pending feature will be like nothing you have tried before! The Flick feature can be slow or fast, soft or hard - it will mimic the sensation that suites your, or your partners, desire. The new generation ElectraStim Flick is also the first product of its kind to incorporate a USB re-chargeable system allowing the Flick unit to be operated up to 4 hours between charges. The ElectraStim Flick Duo dual output stimulator has independent dual output intensity control. It has the "flick" feature on both stimulation outputs and 8 built-in stimulation patterns. It also features 25 intensity level 7-segment LED displays. Since it is USB rechargeable the Duo requires no batteries. The Duo also features a slim ergonomic design with soft touch finish and a durable control panel with tactile control buttons. Pack contains: ElectraStim "Flick Duo" dual output stimulator, 4 x square self-adhesive electrode pads, stimulator output cable, USB charging cable (charge not included), protective pouch, and instructions. 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).