M11 Heads up Display Windshield Projector, OBD2/GPS Speedometer MPH with Speed, 3.5 inch CAR HUD Overspeed Warning, Display Water Temperature, Display distance
$39.99
Guaranteed Safe Checkout
Features & Compatibility
Price: $39.99
(as of Mar 29, 2026 15:25:44 UTC – Details)
Product description
M11-blue
Add to Cart
Add to Cart
Add to Cart
Add to Cart
Add to Cart
Customer Reviews
3.7 out of 5 stars 52
3.9 out of 5 stars 53
3.7 out of 5 stars 97
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2.6 out of 5 stars 6
3.4 out of 5 stars 44
3.9 out of 5 stars 129
Price
$39.99$39.99
$32.99$32.99
$19.99$19.99
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—
$39.99$39.99
$28.99$28.99
System
OBD2+GPS
GPS
GPS
GPS
GPS
OBD2+GPS
GPS
Display Method
Projection on the windshield
Projection on the windshield
Projection on the windshield
Projection on the windshield
Projection on the windshield
Projection on the windshield
Projection on the windshield
Speed Unit
KMH/MPH
KMH/MPH
MPH
KMH/MPH
MPH
KMH/MPH
KMH/MPH
Olock
×
√
×
×
×
√
×
Voltage
√
×
×
×
×
√
×
Driving Distance
√
×
×
×
×
√
×
Driving Direction
√
√
×
√
×
√
√
Water Temperature Alarm
√
×
×
×
×
√
×
Driving Fatigue Alert
√
√
×
×
×
√
√
Overspeed Alarm
√
√
×
√
×
√
√
Voltage Alarm
√
×
×
×
×
√
×
Setting Button
√
√
×
√
×
√
√
Product Introduction
The video showcases the product in use.The video guides you through product setup.The video compares multiple products.The video shows the product being unpacked.
OBD+GPS Dual System for All Vehicles The OBD system is only available for some gasoline vehicles manufactured after 2008, while the GPS system is available for all vehicles. If your car is not compatible with the OBD system, you can switch to the GPS system.
Product Features 
Under OBD system: speed, RPM, water temperature, voltage, direction of travel, distance traveled displayed with the engine off, RPM graph, and trim icon.Under GPS system: speed, voltage, direction of travel, number of satellites, speed graph, and trim graph.
Alarm function 
Car Windshield Flat View Display M11, Universal OBD+GPS Digital Alarm Function with Overspeed Alarm, Fatigue Driving Reminder, Speed Alarm, Water Temperature Alarm and Voltage Alarm.
Auto Brightness Adjustment 
The flat panel display is equipped with a light-sensitive system that changes its own brightness display according to the environment. In addition to this, the display brightness can be manually adjusted according to personal preference.
Product Installation 
Double line use
Double line use，Fully compatible GPS system, can be used with USB cable / can also be used with OBD cable
Installation steps
How to install: 1.Plug in the OBD socket connecter or USB cable to connect the cigarette lighter. 2.Wire is inserted into the A-pillar seal. 3.Connect the OBD able with the HUD Place the HUD to the right position
Product Accessories 
Package accessories：1.Head Up Display 2.USB cable 3.OBD cable 4.Non-silp mat 5.user’s manual 6.Reflection film
【LCD Display】Compact mini 3.5 inch head-up display with a built-in light sensor helps the head-up display to adjust its brightness automatically according to the environment. This car HUD rear visor helps you read data more clearly and is an essential gadget for your driving.
【Product Features】: Speed / RPM / Water Temperature / Voltage / Fuel Consumption / Driving Direction / Single Mileage / Single Driving Time / Hundred Kilometers Acceleration Time / Elimination of Fault Codes and other driving data, so that you don’t have to look down on your windshield to easily read the car data.
【Compatibility:】 The OBD mode of this product is only applicable to most gasoline vehicles after 2008, and the GPS mode is applicable to any car. OBD mode directly reads the original car data, while GPS mode requires searching for satellites to display the data. When your car does not comply with the OBD protocol, please switch to GPS mode within 5 seconds of starting up. OBD2 mode is not compatible with hybrid electric vehicle, diesel car, pickup truck, RV, computer modified car, it is recommended to use the GPS mode.If you are unsure if your car can use the product’s OBD mode, you can ask us.
【Gift Ideas】This HUD screen is powerful and affordable. This is a great gift for most people who want to be safe and have a very comfortable driving experience. Not only can you give it as a gift to yourself, but you can also give it to your wife, husband, family, friends or roommates.
【After-sales service】: Our products have been inspected twice by the quality inspection department before leaving the factory, and all the problems encountered by the products within one year have not been solved, and any problems about this product can be consulted in the form of e-mail, and we will provide you with better after-sales service!
Schtephan –
Very Satisfied—Cheap, Accurate, Easy to install
Auto-shutdown works, did not drain my battery so far, works well, very easy to connect and set up, pretty cheap, accurate, easy to see the speed even against the sun.
justin –
We are living in the future now! Simple Easy to See
Little pricey but the odb2 readings are good, i have larger tires and the odometer reading is about 5mph off, changing the unit to “menu 1: 102” setting reads accurate compared to google maps gps, hopefully no more speeding tickets :/-visibility is great, not using the supplied reflective laminate sheets
Aji –
Works when it has its mood
This HUD is acting up randomly. Its connected to a RAV4 and at times it shows the speed ( which should be the case) some times the voltage and it restarts itself
Dave Wright –
HUD: Heads-Up Display… or Highly Unreliable Dashboard?
Bought the Liiiyuan M11 Heads-Up Display because I thought, “Hey, let’s bring my car into the future.” Spoiler alert: turns out the future is mildly inaccurate and slightly overconfident.At first, it seemed promising — numbers showed up on the windshield like magic. I felt like I was in a sci-fi movie… until I realized the HUD speed has a vivid imagination. Under 35 mph? Close enough. But once you hit highway speeds, it starts to lie like a politician before election day. At 55, it’s already claiming I’m doing 58 — thanks, I guess? Great for building self-esteem, terrible for avoiding speeding tickets.Not sure if there’s a secret calibration method hidden in an ancient scroll or if it’s just vibing on its own terms, but I haven’t found a way to make it accurate yet. So now I have two speed readings and trust issues.If you want a gadget that kind of tells you how fast you’re going — give or take a few mph and a pinch of fantasy — this is the one for you.
Ethan Whitmire –
Staying safe at a great price
The only thing that is discouraging about this product is the cord was considerably too long, which was the only thing that I found wrong with this product. It performs very well it’s only 3 miles an hour off at 65 miles an hour. It’s clearly visible in the daytime And allows me to keep my eyes where they belong, which is on the road.
Joseph D. –
Unreliable
Works ok when it works. I had to calibrate and set an offset to get it to read correctly. Not a huge deal, and it makes sense that it can differ in each vehicle. Oftentimes, it would power on and tell me my car wasn’t compatible, even though it is. Got tired of it and threw it away.
Amazon Customer –
Great! But Range Rover incapable
Worked perfectly for one day. Then it messed up my cars computer & my Range Rover wouldn’t run. Dealership advised not to use. Would be great for a vehicle not so fragile.
Matthew Newman –
Speed and direction!!
Last brand i bought was inaccurate. This brand was also off by about 2 or 3 mph. Instructions told me an easy way to change a setting and make it accurate. Fixed that setting and the mph is spot on! I also love how I can see my direction of travel. Amazing. Easy to see even in bright sunshine.
Christina Lana –
This is a game changer – drove from Victoria to NSW and it was so good to help me keep my eyes on the road and within the speed limits
Michael Malone –
This is my first HUD that has a projection to the windshield feature. My previous HUD was non-projection. A projection type HUD, for all intents and purposes, is a safer type of HUD, since one doesn’t have to take their eyes from the road to see the HUD reporting if mounted within the driver’s field-of-vision. During the day, it is a little difficult to see the projected speed on the windshield ….. but very much improved with the plastic shield that can be mounted on the windshield in the area where the speed numbers are projected. It darkens that area of the windshield so the numbers stand out better.Other things I should point out about this unit are the following:(1) Being in Canada, I had to change the speed units from mph to km/h.(2) the actual reported speed in comparison to my car speedometer was off by about 10 km/h, so I had to re-calibrate it for accuracy. Both (1) and (2) processes are covered off in the manual.(3) On the plus side, the unit boots up at the open click of the door locks of the car and after the car is parked and shut down, 30 seconds later, the unit will power itself off. On the minus side, when I press my car remote to lock the car doors, the unit boots up again and awaits for signals from the OBD. Only THIS time, it does not power itself off after 30 seconds of inactivity but continues to drain the battery until you start the car again. The way around this inconvenience and possible risk is to manually press power off/on button on the unit when exiting or entering the vehicle. This way YOU have total control of it’s operation.Room for improvement, hence my one star deduction:(1) The other displays that this HUD offers can only be seen by pressing the appropriate button on the unit. The problem is that the buttons face towards the windshield hence not able to see which button to press without handling the unit. A small remote to step thru the displays would be most welcome.(2) The instruction manual is complete but the text is so tiny, it is extremely difficult to read without the use of a magnifying glass. So my recommendation is to increase the font and make it a pleasant experience.Otherwise, so far so good!!! 👍👍