I think the Large size is good because it has good balance with MONKEY's Meter and voltage is also displayed. Above all, I can now tell the position of the GEAR by the RPMs while driving, and I am less likely to put the car into the phantom 5th gear ^_^;
The Tachometer has a max. rpm of 9000, so the needle has a lot of range of motion while running, so it is fun while running.
Installation is easy if you follow the instructions in the Instruction Manual, but since I use USB power from the Brake, I used Harness to get power from the Light.
There are many reviews about how narrow the inside of the light is, but if you stop the wiring with a tie wrap or something, it fits nicely. The hardest part was tightening the screws when fastening the Meter and Tachometer together. Overall, I think it is easy to install.
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