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Xiaomi Redmi Projector 4 specifications and in-depth review

Xiaomi Redmi Projector 4

Manufacturer: Xiaomi

The Xiaomi Redmi Projector 4 is a compact home projector that combines wireless streaming convenience with built-in smart TV functionality. Weighing 1500 g and measuring 204.8 mm in height, it is designed to fit comfortably in most living spaces. One of its notable capabilities is Chromecast built-in, which allows users to cast content directly from compatible devices without additional hardware.

On the technical side, the Redmi Projector 4 outputs at 1080p resolution and supports a maximum projection size of 120″, making it suitable for larger viewing setups. Connectivity options include one HDMI port, one USB port, Wi-Fi, and Bluetooth 5.1, alongside support for Miracast and DLNA certification. The projector features stereo speakers with a combined audio output of 2 x 5W, a 3.5 mm headset jack, a sleep timer, and a dedicated smartphone app for added control flexibility.

Pros
  • Supports Chromecast built-in, Miracast, and DLNA, offering multiple wireless streaming options without extra hardware
  • Built-in smart TV functionality removes the need for an external streaming device
  • Stereo speakers with 2 x 5W output and a 3.5 mm headset jack provide flexible audio options
  • Bluetooth 5.1 enables stable wireless audio device pairing
  • Can project images up to 120 inches, allowing for a large viewing area
  • Comes with a dedicated smartphone app and remote control for convenient operation
Cons
  • Lacks motorized focus and zoom, requiring manual adjustments that can be less precise
  • Does not support HDR10, HDR10+, or HLG, limiting dynamic range in supported content
  • No lens shift in either direction, restricting flexible placement options
  • Absence of an external memory slot limits local media playback without additional hardware
  • Does not support voice commands, reducing hands-free control options
  • No Ethernet port, making wired network connection unavailable
Who is this for?

This projector is well-suited for users who want a straightforward home cinema setup with wireless streaming at the center of their experience, thanks to Chromecast built-in, Miracast, and DLNA support alongside built-in smart TV functionality. Those who prefer a clutter-free environment will appreciate the range of wireless connectivity options that reduce dependence on external devices. It also fits casual viewers looking for large-screen projection up to 120 inches in a moderately controlled lighting environment, paired with the convenience of a smartphone app and remote control for easy day-to-day use.

Who is this NOT for?

Users who require precise image placement flexibility will find this projector limiting, as it offers no lens shift in either direction and relies entirely on manual focus without any motorized assistance, making setup in unconventional spaces more challenging. Content enthusiasts who prioritize high dynamic range viewing will be disappointed by the absence of HDR10, HDR10+, and HLG support, which means the projector cannot render the extended contrast and color depth these formats offer. It is also not well-suited for users who need wired network connectivity or local media playback, given the lack of an Ethernet port and no external memory slot.

General info:

has laser light source ✕
width 125 mm
height 204.8 mm
thickness 151.4 mm
weight 1500 g
Has a dedicated smartphone app ✓
volume 3875.84 cm³

The Xiaomi Redmi Projector 4 has a compact physical footprint, measuring 125 mm in width, 204.8 mm in height, and 151.4 mm in thickness, with a total volume of 3875.84 cm³. It weighs 1500 g, keeping it relatively portable for a home projector. The unit does not use a laser light source, relying instead on a conventional lamp. It also supports a dedicated smartphone app, giving users an additional way to manage settings and control the device from their phone.

Projection quality:

output resolution 1080p
has motorized focus ✕
maximum projection size 120"
has motorized zoom ✕
supports HDR10+ ✕
has manual focus ✕
supports HDR10 ✕
supports HLG ✕

The Xiaomi Redmi Projector 4 delivers a 1080p output resolution and can project images up to a maximum size of 120″, making it capable of filling a large screen area. Focus adjustment is fully manual, as the projector does not offer motorized focus or motorized zoom. It does not support HDR10+, HDR10, or HLG, so playback is handled without any of these high dynamic range formats.

Connectivity:

HDMI ports 1
has AirPlay ✕
Has Bluetooth ✓
supports Wi-Fi ✓
USB ports 1
has Chromecast built-in ✓
has a VGA connector ✕
Bluetooth version 5.1
is DLNA-certified ✓
has a DVI connector ✕
supports Miracast ✓
RJ45 ports 0
Has S/PDIF Out port ✕

The projector's wireless connectivity includes Wi-Fi, Chromecast built-in, Miracast support, and DLNA certification, covering a solid range of streaming and casting options. Bluetooth 5.1 is also on board for wireless audio pairing. On the wired side, there is one HDMI port and one USB port, while VGA, DVI, RJ45, and S/PDIF connections are absent. AirPlay is not supported.

Features:

has stereo speakers ✓
has lens shift (vertical) ✕
has lens shift (horizontal) ✕
has a remote control ✓
has built-in smart TV ✓
has a built-in speaker ✓
audio output power 2 x 5W
has a socket for a 3.5 mm audio jack ✓
has a sleep timer ✓
has Dolby Atmos ✕
has an external memory slot ✕
has voice commands ✕

The projector includes built-in stereo speakers with an audio output of 2 x 5W, along with a 3.5 mm headset jack for wired audio output, though Dolby Atmos is not supported. It features built-in smart TV functionality and comes with a remote control for straightforward navigation. A sleep timer is also available for scheduled shutoff. The unit does not offer vertical or horizontal lens shift, an external memory slot, or voice command support.

Final Verdict

The Xiaomi Redmi Projector 4 presents a well-rounded feature set for everyday home projection use, anchored by its built-in smart TV functionality combined with Chromecast, Miracast, and DLNA support, which together eliminate the need for external streaming devices. Its 1080p output and 120-inch maximum projection size deliver a capable large-screen experience, while stereo speakers, Bluetooth 5.1, and a dedicated smartphone app add practical convenience. That said, the absence of motorized focus, lens shift, and HDR format support does place certain limitations on setup flexibility and image depth. For users seeking a straightforward, wireless-ready projector without complex installation requirements, the Redmi Projector 4 represents a functionally complete option within its category.