By applying direct vacuum suction and thrilling vibrations on the most sensitive area of your penis the Vibrating Head Trainer feels just like a real blowjob – only better. Squeeze the medical-style pump bulb and push the power button on top of the pump to enjoy mind-blowing sensations while you grow. To prolong ejaculation slide the included enhancement ring over your shaft until it’s snug. Press the quick-release button to instantly relieve pressure. Requires 2 AA batteries not included.