“Excellent unit - the Speedometer was the primary use for this little unit and it is only 1/3rd the size of rge screen. the bottom 1/3 i have no idea what its for ( nothing i can read with my eyes ) Easy to install - follow the instructions. This unit is designed for a road bike. I used 2 on 2 MTB's but i have the swing the transmitter inwards closer into the spokes so the magnet can be detected as the front forks are x2 as wide as a road bike. Still works !!!”