Buh-bump is a highly conductive electrolyte cream for heart rate monitor users, who demand accurate and consistent readings from warm-up to cool-down. Heart rate monitor manufacturers from Acumen to Polar to Cardiosport all recommend moistening the electrodes of the transmitter for best results. The current moistening agent by default according to HRM users is spit. Spit? While unsanitary and disgusting, saliva does work for some people, but its like using rabbit ears on a TV when you could have cable. It all comes down to getting the best reception possible. Reception is key to heart rate training. Nothing is more frustrating to a HRM user than watching their heart rate appear one second and disappear the next due to lousy reception. Hands down buh-bump provides the best reception possible! It works Perfectly and 100% of the time! A strong assertion, but true because buh-bump contains electrolytes and electrolytes conduct an electric current. The principles of heart rate monitor technology are based on reading the body's electric current and then transmitting the signal to a wrist worn receiver. Using buh-bump is hassle free. It takes only a small amount of buh-bump applied directly to the transmitter electrodes to obtain accurate and consistent readings all the time! A four ounce bottle will last approximately 3 months based on 5 workouts a week.