Super Large Screen LED Display Cycling Bicycle Bike Computer Odometer Speedometer Specifications: Size:Production size 57*40*17MM, LED Size 34*31MM Power by:1 x 3V CR2032 Lithium Battery (Battery included) Specifications: SPD: Current Speed.. ODO: Odometer. DST: Trip Distance.. MXS: Maximum Speed. AVS: Average Speed. TTM: Total trip time TM: Trip time RAT: Riding all time CLK: Clock (12H/ 24H). SW: Stopwatch Temperature TM up trip time up TM down trip time down Trip UP trip distance up Trip DN trip distance down Sleep mode Comparator Maintenance alert Machine oil reminder Over-speed reminder Setting type circumference Low battery indicator Auto Green LED back light Freeze frame memory Separated button Auto: ON/ OFF. Caution: Suit for type diameter whithin 0 mm ~ 9999 mm. Keep the battery away from children.If swallow,please go to the doctor immediately. Batteries contain chemicals that should be handled properly in accordance with local regulations. Package includes: 1 x Bicycle Wired Computer Odometer Speedometer. 1 x Mounting Shoe. 1 x CR2032 Button Battery for Bike Computer. 6 x Cable Ties. 1 x Wheel Magnet. 1 x Manual User.