High quality exercise bike computer compatible with most stationary spin bikes using this monitor type. Designed for use with bikes featuring a headphone jack connection, such as models from Sunny, L-Now, Pleny, and Faafuu. Both speedometer and pulse tracking connections are typically made through 3.5 mm female jacks located on the back of the monitor. Adapters may be required if the device has female jacks (rare cases). Optional heart rate monitoring feature works with bikes equipped with built-in pulse sensors, usually two metal contact points on the handlebars. Re-wiring may be necessary for certain models. Includes 2 x AAA batteries. Color: Black Material: Plastic Package Contents: 1 x Exercise Bike Computer Note: Light reflection and differences in display settings may cause slight variations between the color of the item in the image and the actual product. Measurement may vary by +/- 1-3 cm.