Mini HDMI 2.1 Connector

The Mini HDMI 2.1 Connector, also known as the Mini HDMI 2.1 interface, is a type of HDMI connector. It combines the compact and portable nature of the Mini HDMI interface with the high-performance features of the HDMI 2.1 standard. Below is a detailed introduction:

Connector Type and Specifications

In the HDMI specification, the Mini HDMI connector is classified as Type C. It has 19 pins, with dimensions of 2.42 mm × 10.42 mm (width: 10.5 mm, thickness: 2.5 mm). It is nearly 1/3 smaller than the standard HDMI Type A connector. This connector is mainly used in portable devices such as digital cameras, portable media players, and some graphics cards.

Technical Features

The Mini HDMI 2.1 connector complies with the HDMI 2.1 standard and incorporates a series of technical advantages of HDMI 2.1. 

Its maximum bandwidth is increased to 48 Gbps, enabling support for resolutions up to 10K. It also supports high-definition, high-refresh-rate video transmission such as 8K@60Hz and 4K@120Hz.

It supports Dynamic HDR and the BT.2020 color gamut, which enrich image details and deliver more realistic colors.

In terms of audio, it upgrades the original Audio Return Channel (ARC) to the Enhanced Audio Return Channel (eARC). eARC supports a transmission bandwidth of up to 37 Mbps, allowing the transmission of uncompressed 5.1-channel, 7.1-channel, and even 32-channel audio. It is compatible with various advanced audio formats such as DTS-HD and Dolby TrueHD.

Additionally, it features functions like Variable Refresh Rate (VRR), Quick Media Switching (QMS), Quick Frame Transport (QFT), and Auto Low Latency Mode (ALLM), which enhance the gaming and multimedia experience.

Product Parameters

KKG Electronics, each part of the use of temperature-resistant materials, high-temperature testing equipment 260 ℃ for 5 minutes, the appearance of the product does not change!   

Owing to its compact size (nearly 1/3 smaller than standard HDMI Type A) and the high-performance capabilities of the HDMI 2.1 standard (such as 48Gbps bandwidth, 8K/4K high-resolution & high-refresh-rate support, and eARC audio transmission), the Mini HDMI 2.1 Connector is widely used in scenarios that demand both portability and high-quality audio-visual (AV) signal transmission. Its core application fields are as follows:

Portable Imaging & Photography Equipment

It is a common interface for small-sized imaging devices that require real-time high-definition (HD) preview, playback, or data output:

Digital Cameras & Camcorders: Mid-to-high-end mirrorless cameras, compact professional cameras, and handheld camcorders (e.g., some Sony α-series, Canon EOS M-series models) use Mini HDMI 2.1 to connect to external monitors (such as on-camera field monitors) or projectors. This enables photographers/videographers to view 4K@60Hz footage with accurate colors (supported by BT.2020 gamut) during shooting, or play back high-quality videos directly on large screens after shooting.

Drones & Action Cameras: High-performance drones (with built-in 4K cameras) and action cameras (e.g., certain GoPro or DJI Osmo models) adopt this connector. It allows users to transmit 4K HDR aerial footage or sports videos to TVs, tablets, or laptops in real time, ensuring clear and smooth playback without signal loss.

Portable Gaming & Entertainment Devices

For small gaming hardware that pursues low latency and high refresh rates, Mini HDMI 2.1 meets the demand for immersive gaming experiences:

Handheld Game Consoles: Some high-end handheld gaming devices (e.g., premium retro game consoles or portable 4K gaming terminals) use this interface to connect to external displays (such as 4K gaming monitors). With support for VRR (Variable Refresh Rate) and ALLM (Auto Low Latency Mode), it eliminates screen tearing and reduces input lag, providing a console-level gaming experience on the go.

Portable Media Players: High-resolution portable media players (PMPs) designed for 4K HDR video playback rely on Mini HDMI 2.1 to connect to home theaters or HD TVs. It ensures uncompressed transmission of 4K@120Hz videos and supports advanced audio formats like Dolby TrueHD via **eARC**, delivering cinema-like audio-visual effects.

Professional Portable Computing & Display Accessories

In professional scenarios that require mobile high-performance AV output, this connector serves as a key link:

Miniature PCs & Single-Board Computers (SBCs): Compact computing devices (e.g., high-performance mini PCs for field work, or advanced SBCs like NVIDIA Jetson Nano developer kits) use Mini HDMI 2.1 to connect to 4K monitors or industrial displays. This enables tasks such as real-time data visualization, 4K video editing, or AI-driven image processing in space-constrained environments (e.g., field engineering, outdoor media production).

Portable Monitors & Projectors: Some ultra-slim portable monitors (13–15 inches) or mini projectors (supporting 4K output) are equipped with Mini HDMI 2.1 ports. They can pair with laptops, tablets, or cameras that have matching interfaces, forming a lightweight "on-the-go" HD display system—ideal for business presentations, outdoor movie screenings, or remote work setups.

Specialized Industrial & Medical Devices

In industries requiring compact design and reliable high-definition signal transmission, Mini HDMI 2.1 also plays a role:

Industrial Inspection Equipment: Small-sized industrial endoscopes, high-precision surveillance cameras, or machine vision sensors (used in manufacturing, automotive maintenance, etc.) use this connector to transmit 4K HD inspection footage to industrial monitors. This helps technicians clearly observe tiny details (e.g., internal components of machinery) in real time.

Medical Imaging Devices: Portable medical equipment (e.g., handheld ultrasound scanners, miniaturized X-ray image viewers) adopts Mini HDMI 2.1 for AV output. It ensures accurate transmission of high-resolution medical images to displays in clinics or emergency vehicles, supporting quick diagnosis without compromising image quality.

Q: What is a Mini HDMI 2.1 connector?

A: It's a compact version of the HDMI 2.1 interface, designed for connecting portable devices like cameras and laptops to displays, supporting high resolutions and refresh rates.

Q: What are the key features of HDMI 2.1 via this connector?

A: It supports 8K@60Hz and 4K@120Hz video, Dynamic HDR, and enhanced audio return channel (eARC) for superior audiovisual quality.

Q: Is a Mini HDMI 2.1 cable backward compatible?

A: Yes. You can use adapters to connect to standard HDMI ports, but for full 2.1 features, all devices and cables in the chain must support HDMI 2.1.

Q: Which devices commonly use Mini HDMI 2.1?

A: It's typically found on compact electronics like high-end action cameras, DSLR cameras, and some premium tablets.

Q: Can it handle gaming at high frame rates?

A: Absolutely. Its high bandwidth (up to 48 Gbps) is ideal for smooth gaming at 4K/120Hz, provided your display and source device support it.

Q: Does the cable quality matter for Mini HDMI 2.1?

A: Critically. To ensure stable performance at high resolutions, always use a certified, high-speed cable.