High quality. Compatible with most exercise spin bikes using this monitor for stationary bikes with "headphone" look connection tips. Fits models such as Sunny, L-Now, Pleny, Faafuu. 90% of domestic bikes use this type. Both speedometer and pulse tracking connections are through 3.5 mm female jacks on the back of the monitor. Adapters (NOT INCLUDED) may be needed if the device has female jacks (rare cases). [Optional Heart Rate Monitoring Feature] An optional feature that works with bikes equipped with pulse sensors (typically two metal pieces on the handlebars). Re-wiring might be required for some specific 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 to appear slightly different from the real thing. Measurement allowance is +/- 1-3 cm.