Multi-functions: Small size, light weight, wireless, waterproof design makes it convenient and durable. This bicycle computer measures speed, distance, and riding time. Exactly what any serious bicyclist or fitness fanatic needs to know for stats tracking. Auto Sleep Function：After no signal inputs of 300 seconds, the screen will go into a standby sleep mode with LCD displays. When you shake it or any signal is inputted or any button is pressed,this cycle computer will automatically wake up Day Night Backlight: Provides backlight for easy viewing during dark hours. The backlight will automatically turn on when any button is pressed between 18:00 and 06:00. Please note the slight rattle sound from device is normal phenomenon, which results from the design of wireless automatic function. Easy to Install Use: Simple installation that only takes a few minutes. Easy to navigate interface with only two buttons to access all measurements. Customizable to most common tyre sizes for accurate stats tracking. Applicable: Road bicycles, mountain bikes, folding bikes,and other common bicycles are compatible with this bicycle computer. This bicycle computer MAY NOT be compatible with some electric-assist bicycles. If the computer display, sensor, and magnet can be installed within the specified distances device should be fully compatible. Please do not hesitate to contact us with any questions. Product Parameters: SPD: Current Speed T.m: Elapsed Time Back Light ODO: Odometer DST: Trip/Distance Auto Wake Up CLK: Clock Scan MXS: Maximum/Speed Comparator AVS: Average/Speed Setting Speed Scale (km/h, m/h) Setting Tire Circumference (0mm~999mm) Setting The Last Value Of Odometer (km/h,m/h) Signal Interference-Resistance Freeze Frame Memory Wireless Transceiver Auto On/Off What's included: 1* Seat 1* Magnet 2* Stickers 1* 23A battery 1* CR2032 Battery 1* Wireless sensor 6* Plastic tie-wrap 1* Bicycle Computer 1* User Manual Simple Steps Setup:: Install Batteries(Both Sensor and Bike comouter requires batteries) Reset and Pair the computer before first use in order to achieve the most accurate results 1.Install the Seat 2.Mount the Sensor on the front wheel 3.Mount the magnets on the front wheel's spoke 4.Set the computer into the Seat More closer, More senstive Warm Tips: 1. The bicycle computer is fine after it soak into water in short time or in short moderate rain or a short period of heavy rain, But do not recommend a long time in the water, to avoid the malfunction due to water ingress. 2. If no signal has been received for 300 seconds, the computer will enter into Sleep Mode, the CLK value remains. It will turn back to the previous mode with all the date collected when the signal is received again or any button is pressed. Built in ball switch, Automatically wakes from sleep mode upon sensing vibration in the bicycle. Provides backlight for easy viewing during dark hours. Small size, light weight, wireless, waterproof design makes it convenient and durable. Simple installation that only takes a few minutes. Road bicycles, mountain bikes, folding bikes,and other common bicycles are compatible with this bicycle computer.