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, and Faafuu. 90% of both domestic and international models use 3.5 mm female jacks on the back of the monitor for speedometer and pulse tracking connections. 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 might be required for certain models. Includes 2 x AAA batteries. 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 differences in display screens may cause slight variations in the color of the item shown in the picture compared to the actual product. Measurement error allowance is +/- 1-3 cm.