Designed for the golfer, the StrokeRhythm is an ultra-small metronome that fits in your ear like an earphone. By practicing your swing while listening to the beat directly in your ear, you can stabilize your rhythm and improve your swing. You can also choose from a wide range of tempo and beat settings to find a swing rhythm that's right for you. The jog switch allows smooth tempo adjustment, and a unique mechanism holds the unit securely in your ear. The StrokeRhythm is a unique style of metronome that you wear directly in your ear. Since the speaker unit simply fits in your ear, it lets you practice your swing to the rhythm that only you can hear in your own ear, without affecting any other golfers. The StrokeRhythm is also extremely small and lightweight, allowing you to concentrate on your swing without being distracted by fact that you're wearing a metronome. Improving your form is of course an important aspect of improving your golf swing, but it's also critically important to practice regularizing the tempo and rhythm of your swing. Practice with the StrokeRhythm to ensure that your swing always maintains a steady tempo and rhythm. The tempo setting range is a generous 30--252 bpm. Typical recommendations are to try a swing tempo of about 70 for men and about 60 for women, but you can experiment with a variety of tempo settings to find the tempo that's right for you. The beat can also be specified in the range of 0--9, so you can choose the beat that's best for you to practice your swing. In addition to its usefulness when practicing a musical instrument, the StrokeRhythm can also enhance your exercise. For example, people who walk for the purpose of exercise or weight loss are often advised to walk at least 20 minutes at a regular pace of at least 70 meters per minute; by using the StrokeRhythm you can keep your training pace constant, synchronized to the sound of the metronome. This is a great way to maintain a consistent speed for walking, jogging, race-walking, weight training, or any other exercise. The StrokeRhythm utilizes two distinctive mechanisms to ensure a stable fit in any ear, large or small. The first is an Ear Fitter that extends from below the speaker. Its angle can be finely adjusted by rotating the speaker itself, allowing to fit the various shapes of ear hole. The second is an Ear Clip that opens or closes to fasten on the earlobe. The clip ensures a solid hold that will not be dislodged even by sudden shocks or vigorous movement when in use.SpecsTempo Range 30 - 252/min (BPM)Beat Settings 0 - 9 beatsRhythm Settings Quarter Notes, Duplets, Triplets, Triplets with inner beat omitted, Triplets with the third beat omitted, Quadruplets, Quadruplets with middle beats omitted, Quadruplets with the third and fourth beats omitted Volume Settings 2 levelsTempo Accuracy +/- 0.1Speaker 12mm Piezoelectric SpeakerSwitch Controls Power, Mode, Jog Up/DownDisplay Modes Tempo, Beat, Rhythm, VolumePower Supply CR2032 lithium battery (3V)Battery Life Approximately 200 hours (continuous use at Tempo = 120, Beat = 4, Rhythm = Quarter Notes, Volume = Low)Dimensions (W x D x H) 49 x 22 x 22 mm / 1.93” x 0.87” x 0.87”Weight 9 g / 0.32 oz. (including battery)Earphone Diameter 16 mm / 0.63"Included Items CR2032 lithium battery (3V), Ear Pad, Carrying Case