bodyjoys.co.uk: With customisable exercise modes, the Optimum Series Advanced Automatic Smart Pump lets you effortlessly improve stamina and enjoy a longer, stronger hard-on. This sleek penis pump is durable for superior suction and performance, and the easy-touch buttons and LED screen let you enjoy simple manual pumping or set workouts of up to 20 minutes. Use the quick air release button to decrease the suction or release the seal.