and high quality.[Most Exercise Spin Bikes use this monitor] - for Stationary Bikes with head phone look connection tips.E.g.by for bikes Sunny,,L-Now,,,Pleny,,,Faafuu - 90% of Amazon as well as domestic Both speedometer pulse trakcing connection are through 3.5 mm female jacks on the back the monitor - adapters (NOT INCLUDED) might be needed if the device also happen to have FEMALE jacks (rare cases)[Optional Heart Rate Monitoring Feature]An optional feature that works with bikes with pulse sensors (usually 2 x metal pieces on handle bars).Re-wiring MIGHT be required for some perticular models.2 x AAA Batteries IncludedColour: Blackmaterial: plasticPackage Contents:1 x Exercise Bike ComputerOnly the above package content,other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing.The measurement allowed error is +/- 1-3cm.