36353 Look no further. Excellent product quality， that's solidly built. Best of all， its very affordable price. Buy this instant. Color: black Size: 46 x 43 x19 mm Power supply: 1 x CR2032 battery (included) With backlight Fuctions: CLOCK - time display TRIP - trip display RIDETM - ride time AVSPD - average speed MAXSPD - max speed ODO - total trip Additional functions: STW - stopwatch TEMP - instant temperature display MNTEMP - min. temperature MXTEMP - max. temperature CAL - instant Calorie consumption KCAL - total calorie consumption FAT - fat burns "KM +" - target trip up "TIME +" - riding time up SCAN - scan trip， ride time， and average speed Note: If the additional functions are turned off， they won't be displayed on main mode. (Default setting: Off) Wheel track specification (the last 4 numbers are codes) 16x1.75x2 1272 27x1 1/4 2199 20x1.75x2 1590 27x1 1/4 Fifty 2174 24x1 3/8A 1948 24x1.75x2 1907 26x1 1973 26x1.5 2026 26x1.6 2051 26x1.75x2 2070 26x1.9 2089 26x1.95 2075 26x2.00 2114 26x2.125 2133 26x1 3/8 2105 26x1 3/8x1 1/2 2086 26x3/4 1954 26x2.1 2090 28x1.5 2224 28x1.75 2268 28x1 1/2 2265 28x1 3/8x1 5/8 2205 700x18C 2102 700x20C 2114 700x23C 2133 700x25C 2146 700x26C 2124 700x28C 2149 700x32C 2174 700x35C 2205 700cx38 2170 700x40C 2224 Note: Please install the magnet as close as possible to the sensor. It'd be better to keep at 4mm. 1 x Bicycle computer 1 x Magnet 1 x Ties kit 1 x Data cable 1 x English user guide 1 x Rubber ring In original package