Features: This is a great tool for its price. This Bike Computer Odometer Speedometer has many useful functions. It is also very durable considering even you have put over 500 miles on it, you even don't have to change the battery. It is functioned as tracking your training progress in real time. Easy operation and durability make it popular with people. Generally speaking, with it, you can control your riding every moment. Functions: SDP : CURRENT SPEED ODO : ODOMETER DST : TRIP DISTANCE MXS : MAXIMUM SPEED AVS : AVERAGE SPEED TM : ELAPSED TIME CLK : CLOCK (12H/24H) SCAN \"+\"\"-\" COMPAPATOR SETTING SPEED SCALE(KM/H.M/H) SETTING TYRE CIRCUMFERENCE:(0MM-9999MM) FREEZE FRAME MEMORY AUTO : ON/OFF Installation Tips: 1. Mount the meter head to the handlebar; 2, The AG13 button battery is loaded into the battery slot on the back of the meter 3, Initialization code table data, generally only need to set the tire circumference a parameter can be used normally; 3. Insert the meter head into the head chute; 4. Install the sensor on the front fork, and the sensor head is facing the spoke; 5, The induction magnet is mounted on the spokes, aligned with the induction head, about 5 mm apart; 6. Secure the cable with a nylon cable tie; 7. Check if the above header holder, sensor and induction magnet are installed firmly. Note:Sensing distance of the probe and the magnet holder 5-10mm Specifications: Net weight:67g Package weight:77g Color:Black+Red Package Included: 1 x Bike computer console 1 x Wheel magnet 1 set x Cable tie ( not including battery)