High quality exercise bike monitor compatible with most stationary bikes. Designed for use with bikes featuring a headphone jack connection. Fits models from Sunny, L-Now, Pleny, Faafuu, and others. Both speedometer and pulse tracking connections are 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 pulse sensors, typically two metal contact points on the handlebars. Rewiring may be necessary for certain models. Includes 2 x AAA batteries. Color: Black. Material: Plastic. Package includes: 1 x Exercise Bike Computer. Batteries included. Other items not included. Note: Lighting and display differences may cause slight color variations between the image and the actual product. Measurement tolerance: +/- 1-3 cm.