RX3 Multi-Function Gauge

Applicable Models: Universal
Tachometer Range: 0-15000, 0-12000 RPM
Backlight Color: 5-color LED backlight
Product Manual

Origin -
KOSO was officially established due to the indispensability of an independently developed brand for future market marketing. Therefore, KOSO was registered as the brand trademark in 1989. KOSO originates from the Japanese words "Kōsu" (conception) and "Kōsoku" (high-speed). Conception means creativity, and high-speed represents high-performance expression – combined, it signifies the company's hope to create high-performance products through creativity!

Spirit -
The brand spirit KOSO pursues is to build quality, technology, and service on the foundation of integrity and mutual trust. We persistently hold this attitude, not only manufacturing high-quality products but also pursuing product innovation and quality improvement, hoping to bring more excellent products to everyone.


Brand Journey -
Striving for perfect product design and quality has always been our goal. Therefore, KOSO continuously pushes itself by improving its technology. We firmly believe that brand image and product quality are synonymous! Thus, the company has stringent requirements for product development, production processes, and quality control, aiming to achieve high-quality goals while stepping onto the world stage. In the future, KOSO will continue to develop more user-friendly and innovative products, aspiring to become the next world-leading Taiwanese brand within ten years, another Taiwanese pride, and the pride of the Taiwanese people.


Exhibitions and Certifications -
Tong Ya Electronics began exhibiting in Italy in 2001, gradually stepping onto the international stage, bringing KOSO's dedication and professionalism to the global market, and striving to convey an image of high quality and innovation. In 2007, we obtained the TS16949 international certification, and in 2024, we obtained ISO 14001 and ISO 45001 international certifications. We will continue to create more captivating products in the future. Every product launch requires actual installation testing, which is the most rigorous quality inspection method. Regardless of how well a product is designed, its quality is tested once it is actually installed and used. To further improve quality and product testing, we participate in international competitions, and each award is an affirmation of our products, as it allows no room for error in modification or installation. We are this meticulous about quality. Test reports and product measurement charts are also demonstrations of our installation results for customers. It is precisely this diligence that allows our products to exhibit progressively better quality.




Equipment and Challenges -
Our pre-shipment inspection for every product utilizes the most advanced technical equipment, setting various conditions to simulate and conduct tests such as vibration tests, waterproof tests, etc. All commissioned cooperating manufacturers who have undergone the inspection process acknowledge our principles of quality control and the reliability of our test results. Remarkably, under these rigorous, 'level-passing' product tests, we also incorporate different conditions and adjust based on actual environments. Coupled with user-friendly operation, this allows for the most realistic product testing and quality improvement after revisions.

※The vehicle model may have different specifications in different regions and may not be compatible for installation.

【Notes Before Ordering】
Please carefully confirm the desired color, size, and other information before ordering.
Most products require confirmation of delivery time after ordering, so there may be situations where products are discontinued or require a long waiting time for shipment.
Orders will not be established if the manufacturer is out of stock or cannot deliver temporarily; no fees will be charged if the order is not established.
Manufacturers may unilaterally change specifications or exterior designs, resulting in packaging or product shapes differing from the product page images. We apologize for any inconvenience.
If the manufacturer unilaterally changes product designs or specifications, rendering the product unable to perform as expected at the time of purchase, please consult our customer service for further handling.
Due to multiple shipping processes from order to delivery, packaging may become deformed or damaged during transit, provided the product itself remains intact and usable.
【Return Policy】
If you require a product return service, please apply through the return section. Please ensure the product's exterior is intact and sealed in its original packaging.
Upon receiving your return request, we will arrange for a logistics provider to collect the item as soon as possible.
Please apply for a return within 7 days of receiving the product for non-human-induced defects.
【Authenticity Guarantee】
For products with an authenticity guarantee, if they are found to be counterfeit and this is confirmed through legal proceedings and a court ruling, we will compensate the customer who purchased the product with 10 times the original purchase price.