Monoprice Blackbird 4K Pro 1x2 Slim HDMI Splitter
- 2 HDMI outputs, both active at the same time
- 18 Gbps maximum bandwidth across the splitter
- Up to 4K at 60Hz with 4:4:4 chroma
- HDCP 2.2 compliant for protected 4K sources
- HDR capable when feeding 4K HDR displays
- EDID taken from the first detected display
Last refreshed Aug 4, 2026 · Based on the Amazon listing and published specifications, not hands-on testing.
A splitter for sending one HDMI source to two screens at once, with the bandwidth and copy protection that 4K HDR gear expects. Both outputs carry the same signal, so it cannot show different content on each screen.
As an Amazon Associate I earn from qualifying purchases. ProductDome earns a commission when you buy through links on this page.
ASIN: B06ZY6YW4HModel: 21612Category: Video Converters
Overview
Not a switcher and not a matrix, the Blackbird takes a single HDMI input and mirrors it to two outputs. The splitter reads the EDID of the first display it detects and passes that capability data back to the source, so the source sends one format both screens can accept. HDCP 2.2 handling lets protected 4K streams flow to compliant displays.
Two screens from one source is the whole job here, and the splitter does it without downscaling or stripping HDR. The limitation is that both outputs are identical, so a viewer who wants a game on one screen and a movie on the other needs a different device. EDID behavior also means the second display follows the first display's capabilities.
Who it's for
Rooms where one player, console or streaming stick has to reach two displays at the same time, such as a TV plus a projector. Buyers who want to route different sources to different screens, or who need each output to run its own resolution, should look elsewhere.
Pros and cons
- Mirrors one source to two displays
- Full 18 Gbps bandwidth path
- Handles 4K at 60Hz 4:4:4
- HDCP 2.2 for protected content
- Both outputs show the same signal
- No switching between multiple inputs
- EDID follows only the first display
- Cables and power supply not listed
Performance notes
Signal quality depends on the bandwidth path and the copy protection handshake. The splitter negotiates EDID with the first display it sees, so the source sends a format that display reports; a second screen with lower capability may not receive an optimal format. HDCP 2.2 lets protected streams reach compliant displays, while a non-compliant screen can blank the protected content.
Specifications
| Brand | Monoprice |
|---|---|
| Model | 21612 |
| Item Weight | 0.8 pounds |
| Dimensions | 7.1 × 4.5 × 4.8 inches |
| Dimensions | 7.1 x 4.55 x 4.85 in |
Frequently asked questions
Can the two outputs show different things?
No. Both HDMI outputs carry the same mirrored signal from the single input, so the same content appears on both screens.
Does the splitter pass HDR to both displays?
It is listed as fully compatible with 4K HDR displays, and it handles HDCP 2.2, so HDR sources can reach HDR-capable screens. Because EDID comes from the first detected display, that screen's capabilities shape what the source sends.
Will a 4K at 60Hz 4:4:4 source stay at full quality?
The splitter supports resolutions up to 4K at 60Hz with 4:4:4 chroma and an 18 Gbps maximum bandwidth, which covers that signal format.
How does the splitter decide what resolution to send?
It automatically uses the EDID of the first detected display. The source then sends a format matching that display, and the second screen receives the same signal.