Features:  - Wired Bicycle speedometer with LCD display, easy to use.  - Monitor your bikes' speed, distance and riding time.  - Perfect to use when riding.Ideal companion for your riding.  - Easy operation and durability make it popular with people.  - With mounting accessories for firm installation.  - Battery powered by 2 pcs CR2032 batteries(built-in).  - Durable and water-resistant for use in all conditions.  - With this bicycle computer, you can manage your riding life more scientific and more reasonable.    Specifications:  Model:  SD-563B;  Dimension :  57*41*20mm;  Color: Black,Blue,Yellow;  Material:  ABS;  Weight: 85g;    Functions:  SPD: Current Speed;  ODO: Odometer;  DST: Trips Distance;  MXS: Maximum Speed;  AVS: Average Speed;  TTM: Total trips time;  TM: Tripstime;  RAT: Riding all time;  CLK: Clock (12H/ 24H);  SW: Stopwatch;  Temperature;  TM up trips time up;  TM down trips time down;  Trips UP trips distance up;  Trips DN trips 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;    Package included:  1 x Bicycle Computer;  1 x Base sensor cable;  1 x Magnet ;  6 x Tie wire;  1 x Instructions