The M-Wave M14W is a fantastic tool to complement your cycling! Featuring wireless transmission between hub and unit, this computer has 14 functions! They include current/average/maximum speed, timers, odometers, and a freeze frame memory. The device is backlit for easy reading. Mounting without tools make installing the computer a snap. You will be amazed at what all this cycling computer can tell you!Digital transmission means no annoying wires to get in your wayOther functions include: an adjustable wheel size, a digital clock, metric/English conversion, and auto powering on and off of the deviceNo tools are needed to mount at handlebar or stemIngress Protection rating 44 means nothing larger than 1mm can penetrate the device, and it is protected against splashing water from any directionBatteries are included!