UGREEN HDMI Splitter 1 In 2 Out 4K UK – CM619

The UGREEN HDMI splitter 1 in 2 (model CM619, part no. 40201UK) is a compact active amplifier splitter that distributes a single HDMI source signal to two displays simultaneously. It accepts one HDMI female input and duplicates the signal across two HDMI female outputs, transmitting identical video and audio to both connected screens without signal loss. Consequently, it suits home entertainment setups, dual-display presentations, classroom installations, and any arrangement where one source must feed two screens at the same time.

As with the four-output 40202UK, it is important to distinguish a splitter from a switch before purchase. A splitter takes one source and sends it to multiple displays simultaneously; it does not select between sources. Therefore, the CM619 is the correct choice when the goal is mirroring one device — such as a laptop, games console, or media player — onto two screens at once. Extended desktop mode across the two outputs is not supported; both displays show identical content at all times.

Amplification, Compatibility, and Power

The CM619 uses active internal amplification, which is why it requires external DC 5V power. This amplification buffers and strengthens the signal before distributing it to both outputs, maintaining picture quality across both displays and supporting input cable runs of up to 15 metres. Without amplification, a passive splitter would halve signal power between the two outputs, resulting in degraded picture quality — particularly on longer cable runs or with displays of differing specifications.

The splitter supports HDMI 1.4 and is fully compatible with HDCP-protected content from Blu-ray players, streaming devices, and set-top boxes. Furthermore, it supports all mandatory and optional 3D formats defined in the HDMI specification, and the operating frequency reaches up to 225MHz / 6.75GHz. LED indicators on the unit confirm power status and active operation at a glance. The UK variant includes a UK-plug power adapter, making it ready to deploy without additional accessories.

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Technical Specifications

Device & Build

Video Performance

Signal

Audio

Power

In the Box

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Use Cases and Applications

Dual-Screen Home Entertainment

A media player, set-top box, or games console in a living room can simultaneously feed two televisions using the CM619 — for instance, the primary TV in the lounge and a second screen in an adjoining dining area. Both displays receive identical full-quality video and audio, allowing different viewers in the same space to watch the same content without routing a second HDMI cable back to the source device. Furthermore, the active amplification maintains signal quality on both outputs regardless of the cable length between the splitter and each display.

Presentations and Classroom Dual-Display Setups

Presenters and teachers frequently need to show content on two screens simultaneously — for instance, a projector screen at the front of the room and a confidence monitor facing the presenter. The CM619 connects both displays to a single laptop or desktop without any additional configuration. Additionally, the plug-and-play design means the connection is recognised immediately upon power-up, so there is no delay before the presentation begins. The UK power adapter makes the unit ready for deployment in British classrooms and meeting rooms without sourcing a separate supply.

Hospitality and Retail Dual-Display Signage

Small-scale digital signage installations — such as a media player driving two information screens in a hotel lobby or two product displays in a retail zone — benefit from the CM619’s straightforward 1-to-2 distribution. Both screens display the same content loop simultaneously, and the active amplification ensures consistent picture quality on each output. Moreover, the compact ABS housing allows the unit to be concealed in a display cabinet or behind a panel without occupying significant space.