Introducing the VDO A series. This A4 Wired unit give you the necessary info with no frills easy navagation. All VDO computers are backed by a Five Year Warranty. Features: 1 wheel size, Auto Sleep-Mode (Display-deactivation), Auto Start/Stop, LCD-size 27 x 25 mm ::Twist-Click-Mount, selectable for handlebar or stem mounting. Speed Display in 0,1 KMH/MPH-steps. Data storage during battery replacement (20 sec.)Functions: Current speed, Trip counter, Total, odometer, Clock.