[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 . [Keywords: HeadPhone-Look Cables]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). 2 x AAA Batteries Not Included - Required Note:Without Heart rate function Colour: as shown Material: plastic Package Contents: 1 x Exercise Bike Computer Only the above package content, other products are not included. Note: Light 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.