Description As a bike computer, measuring current / average / max speed, trip distance / ride time, calories and other real-time riding data.Quickly and accurately get the data you need! Suitable for most types of bicycles.Perfect to use when hiking, climbing, riding and other outdoor actives. Suitable for most types of bicycles, such as mountain bikes, folding bicycles, ordinary bicycles, dirt bicycles, stationary bikes and so on. Features - Color: Black. - Material: Plastic+LCD+Electronic Component. - Size: 7 x 5 x 1.5cm -Dimensions: 2.8 inch - Models: Wired or wireless - Colors: Black - Power supply: 2032 battery - Other Feature: Waterproof -Waterproof and Main Functions: Current speed, clock, Average Speed, Odometer, Maximum speed. - Multifunction: Small size, light weight,waterproof design makes it Portable, durable, comfortable and convenient. This computer measures speed, distance, and riding time.Ideal assistant for training. - Applicable: Road bicycles, mountain bikes, folding bikes,and other common bicycles are compatible with this computer. Suitable for most types of bicycles.Perfect to use when hiking, climbing, riding and other outdoor actives. - Day and Night Use: Provides backlight for easy viewing during dark hours.Perfect for daily use.Package list: 1 x TachometerBattery Included) 1 x Probe Base 1 x Strong Magnet 6 x Nylon Cable Tie 1 x The Instructions 2 x Absorbent Pads