CLIP-ON, CLIP-OFF DESIGN - CyclGage quickly and easily clips on and clips off handlebars. NOTE: Certain handlebar materials may slightly affect compass reading. If this is the case, remove CyclGage from handlebars for an accurate reading. The thermometer is not affected by handlebar materials. CUSHION MOUNTED - Both the compass and thermometer are cushions mounted within the ABS housing. LUMINOUS, LIQUID-FILLED COMPASS - Grade A luminous compass helps you stay on course in low-light conditions. FREEZE AND HEAT WARNING ZONES - Thermometer comes equipped with a freeze warning and heat warning zones to keep you aware of riding conditions. FITS ALL HANDLEBARS - CycleGage comes equipped with a rubber spacer to fit thinner handle bars. Clips are flexible to easily fit larger handlebars. One of the must-have bicycle accessories for road bikes, mountain bikes, and kid's bikes. Quick Clip-On, Clip-Off design. Compass and thermometer are cushion-mounted. Compass is luminous and liquid-filled. Thermometer is liquid-filled. Freeze warning and heat warning zones. Thermometer reads down to a chilly -20 F or -30 C. Accurate plus/minus 2 degrees Celsius.