1、Made from engineering plastic material, it is durable and waterproof, can be used in any conditions, easy to install, equipped with LCD display, which undoubtedly is the ideal companion for cycling. 2、It can also track your training progress in real time without needing to replace the battery for a longer range of more than 500 miles (about 800km). Its simple operation and durability also make it popular with people. 3、This product should be mounted on the handlebars, put the AG13 battery into the back of the battery slot, in order to initialize the data, you only need to set a normal tire perimeter parameter. 4、The sensor should be mounted on the front case, matching the spoke conductor magnet on the spoke, aligned and kept about 3‑5mm / 0.1‑0.2in away from the sensor head, use nylon wire to tie all wires, refer to manual setting for more functions. 5、When you put the battery into the battery slot, press the right button within 15 seconds to set the tire circumference, while reading the wheel diameter and peripheral comparison table. Item Type: Bike Code Table Weight: Approx.67g / 2.4oz Material: Engineering Plastic Battery: AG13 Battery (With Supporting Battery Delivery) Battery Model: AG13 / LR44 Standard Voltage: 1.5V Battery Capacity: 160mah Mode: DST   DST Records And Accumulates Daily Cycling Distances, Average / Maximum Clock  Cycling Time 1 x Wheel Magnet 1Bundle x Cable Tie 1 x Battery 1 x Manual 1 x Bike Code Table 1 x Sensor