INBIKE 17 Functions Big Screen Wired Bike Computer with Back Light Multi-functional, current, average, and maximum speed, time, cycling distance & other date can be recorded The backlight will turn on by pressing any buttons of the bike computer after 18:00, backlight turns to blink for remind you to slow down when your riding speed exceeds 22 mi/H Water resistant, the speedometer is workable in rainy days Size: 2.5*1.6*0.7 inch Weight: 1.05 oz Wire length: 34.6cm Power supply: 1* CR2032 battery Free 8 tie wraps & 2 pieces of sticker for back-up using Note: We have improved this product according to customers' feedback, please feel free to purchase