High quality. Most exercise spin bikes use this monitor. For stationary bikes with a headphone jack connection, refer to connection tips. Compatible with bikes such as Sunny, L-Now, Pleny, Faafuu 90% of both commercial and domestic models. Both speedometer and pulse tracking connections are through 3.5 mm female jacks on the back of the monitor. Adapters (NOT INCLUDED) may be required if the device has female jacks (rare cases). Optional heart rate monitoring feature works with bikes equipped with pulse sensors (typically two metal contact points on the handlebars). Rewiring may be necessary for certain models. 2 x AAA batteries included. Color: Black Material: Plastic Package Contents: 1 x Exercise Bike Computer Only the above package content is included; other products are not included. Note: Light reflection and different displays may cause the color of the item in the picture to vary slightly from the actual product. Measurement allowance is +/- 1-3 cm.