The ElectraStim Flick Duo is a rechargeable electro sex machine with 2 independent channels. Ideal for couples and power players who want to use more toys at the same time, Flick Duo can power up to 4 uni-polar or 2 bi-polar electrodes at once. Each channel is controlled independently, giving you more control over the sensations you feel and improving shared stimulation with your partner. Features 8 pattern settings and 4 motion-activated Flick settings to explore over 25 intensity levels. Uses a universal USB charging system, so you can recharge Flick Duo anywhere in the world without voltage convertors