What is the Kramer VS-21DT auto switcher?
The Kramer VS-21DT is a 2x1 4K60 4:2:0 HDMI automatic switcher with an HDBaseT output. It switches between two HDMI sources using priority or last-connected rules based on active signal detection, and sends the selected signal over HDBaseT up to 40m at 4K60 4:2:0. It is a compact HDMI to HDBaseT auto switcher for classrooms, huddle rooms and training rooms where the display or projector is across the room.
How does the Kramer VS-21DT work?
Two HDMI sources connect to the VS-21DT. When a source becomes active, the switcher selects it according to the chosen scheme, either input priority or last connected, and outputs it on the HDBaseT 1.0 port to a compatible HDBaseT receiver at the display. This combines a switcher and transmitter in one device, which reduces equipment at the table.
The VS-21DT handles up to 4K@60Hz 4:2:0 at 8.91Gbps and is HDCP 2.2 compliant; Kramer notes it does not convert HDCP 2.2 content to HDCP 1.4. Kramer equalization and re-klocking technology rebuilds the digital signal, and 3D pass-through is supported. It runs on 5V DC.
At the display, pair it with a compatible receiver such as the Kramer TP-580R HDBaseT receiver. For HDMI-only switching, see the Kramer VS-211X 2x1 HDMI auto switcher.
What are the key features of the Kramer VS-21DT?
- Auto switching — Priority or last-connected selection based on active signal detection.
- HDBaseT output — Extends up to 40m at 4K60 4:2:0.
- 4K60 4:2:0 video — 8.91Gbps maximum data rate.
- HDCP 2.2 compliant — Passes protected 4K content.
- Equalization and re-klocking — Rebuilds the digital signal for reliable transmission.
- 3D pass-through — Supports 3D HDMI signals.
Where is the Kramer VS-21DT typically used?
- Huddle room
- Training room
- Conference room
- Multi-purpose room
Technical Specifications
| Inputs | 2 HDMI |
| Output | 1 HDBT 1.0 |
| Max Resolution | 4K@60Hz (4:2:0) |
| Max Data Rate | 8.91Gbps (2.97Gbps per graphic channel) |
| Content Protection | HDCP 2.2 (no conversion to HDCP 1.4) |
| Extension | HDBT 1.0 up to 40m at 4K@60Hz (4:2:0) |
| Power | 5V DC, 1A |
| Weight | 0.4 lbs (0.2 kg) approx. |
Frequently Asked Questions
Do I need a receiver with the VS-21DT?
Yes. Its output is HDBaseT, so a compatible HDBaseT receiver is needed at the display.
How does it decide which input to show?
It auto-switches using either input priority or last-connected input, based on active signal detection.
Will it pass HDCP 2.2 content to an HDCP 1.4 display?
No. Kramer states it supports HDCP 2.2 but does not convert to HDCP 1.4.
How far can it send video?
Up to 40m over HDBaseT at 4K60 4:2:0.
What warranty and support are included?
Kramer's manufacturer warranty applies. Creation Networks designs, installs and supports classroom and meeting room systems; see the Kramer collection or contact us.
At Creation Networks, we do everything we can to create an excellent customer experience. This includes fast shipping and easy returns.
- Most in-stock orders placed Monday-Friday ship within 24-48 hours. General restrictions apply; please see our full shipping policy here.
- We offer a 30-day return policy from the delivery date on many products. Product restrictions apply. Restocking fees for the return of open-box items. Please see our full return policy here for more information.
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