This ElectraStim Flick Stimulation Multipack features a dual-channel stimulator, and has 8 preprogrammed stimulation modes. This device also has 4 motion activated flick modes that stimulate you in time with your movements, along with 25 levels to explore. It takes up to 3 hours to charge the device allowing 3 hours of play, and it charges via USB port so you can charge anywhere. You can use up to 4 uni-polar or 2 bi-polar electrodes at the same time across 2 channels. Each channel has its own intensity control. You may share sensations with a partner anywhere you touch. Each of you should use the unipolar electrode. With motion-activated control across nboth channels you can enjoy rhythmic stimulation. Use the 4 flick modes to intensify masturbation and sex by shakind, tapping and flicking the stimulator. You can experience the flick on one or both channels, with our without a partner.