Chromecast devices are
dongles that are powered by connecting the device to an
external power adapter or
USB port using a USB cable. Video-capable Chromecasts plug into the HDMI port of a
high-definition television or
monitor, while the audio-only model outputs sound through its integrated
3.5 millimeter audio jack/
mini-TOSLINK socket. By default, Chromecasts connect to the Internet through a
Wi-Fi connection to the user's local network. A standalone USB power supply with an
Ethernet port allows for a wired Internet connection; the power adapter for early Chromecast models was first introduced in July 2015 for US$15, while the adapter for Chromecast with Google TV was released in October 2020 for US$20.
First generation The original Chromecast measures in length and has an HDMI plug built into the body. It contains the
Marvell Armada 1500-mini 88DE3005
system on a chip (SoC) running an
ARM Cortex-A9 processor. The SoC includes
codecs for hardware decoding of the
VP8 and
H.264 video compression formats. Radio communication is handled by AzureWave NH–387 Wi-Fi which implements
802.11 b/
g/
n (2.4 GHz). The device has 512 MB of
Micron DDR3L RAM and 2 GB of
flash storage. The model number H2G2-42 is likely a reference to ''
The Hitchhiker's Guide to the Galaxy abbreviation "H2G2"—in the novel, the number 42 is the "Answer to the Ultimate Question of Life, the Universe, and Everything." The bundled power adapter bears the model number MST3K-US, a reference to the television series Mystery Science Theater 3000''.
Second generation The second-generation Chromecast has a disc-shaped body with a short length of HDMI cable attached (as opposed to the HDMI plug built into the original model). The cable is flexible and the plug can magnetically attach to the device body for more positioning options behind a television. The second-generation model uses a Marvell Armada 1500 Mini Plus 88DE3006 SoC, which has dual
ARM Cortex-A7 processors running at 1.2 GHz. The unit contains an Avastar 88W8887 radio chip, which has improved Wi-Fi performance and supports the
802.11 ac wireless protocol and 5 GHz band, while containing three adaptive antennas for better connections to home
routers. The device contains 512 MB of
Samsung DDR3L RAM and 256 MB of flash storage. The model number NC2-6A5 may be a reference to the registry number "NCC-1701" of the fictional starship
USS Enterprise from the
Star Trek franchise, the "saucer section" of which the device resembles: NC2 can be read as NCC, and 6A5 converted from
hexadecimal is 1701.
Chromecast Audio Chromecast Audio is a variation of the second-generation Chromecast designed for use with audio streaming apps. Chromecast Audio features a audio jack/mini-TOSLINK socket, allowing the device to be attached to speakers and home audio systems. One side of the device is inscribed with circular grooves, resembling those of a
vinyl record. A December 2015 update introduced support for
high-resolution audio (24-bit/96 kHz) and multi-room playback; users can simultaneously play audio across multiple Chromecast Audio devices in different locations by grouping them together using the Google Home mobile app. The feature made Chromecast Audio a low-cost alternative to
Sonos' multiple-room music systems. The model number RUX-J42 may have been a reference to the
Jimi Hendrix albums
Are You Experienced (stylized "R U eXperienced") and
Midnight Lightning, which had the internal code J-42. Chromecast Audio was also developed with the internal codename Hendrix.
Chromecast Ultra Chromecast Ultra is similar in design to the second-generation model, but features upgraded hardware that allows the streaming of
4K resolution content, as well as
high-dynamic range (HDR) through the
HDR10 and
Dolby Vision formats. (The maximum resolution of the "Ambient" screensaver features is 1080p.) Google stated that the Chromecast Ultra loads video 1.8 times faster than previous models. Unlike previous models that could be powered through a USB port, the Chromecast Ultra requires the use of the included power supply for connecting to a wall outlet. The power supply also offers an Ethernet port for a wired connection to accommodate the fast network speeds needed to stream 4K content. The Chromecast Ultra was one of the first devices to work with Google's now discontinued
cloud gaming service
Stadia; a Chromecast Ultra was included with a controller in the "Founder's Edition" and "Premiere Edition" bundles for Stadia.
Third generation The third-generation Chromecast added 60 frames-per-second playback capability at a resolution of 1080p, compared to the second-generation Chromecast's maximum of 720p at the same frame rate. Google said the third-generation Chromecast offered a 15 percent increase in speed over the second-generation model. The magnetic attachment between the dongle body and HDMI plug that was present on prior models was dropped for the third-generation device. The model contains Chromecast Audio technology, allowing it to be paired with other devices for multi-room synchronized playback.
Chromecast with Google TV Chromecast with Google TV is the fourth generation of the Chromecast product line, and comprises two models: one capable of up to 4K resolution video that was released in September 2020; and a cheaper "Chromecast with Google TV (HD)" model capable of up to 1080p resolution video that was released in September 2022. Unlike prior models, Chromecasts with Google TV are bespoke digital media players based on the
Android TV operating system, with the then-new
Google TV user interface that offers content discovery and search across various media services. Like previous models, Chromecasts with Google TV allow content to be cast to them from other devices. Chromecasts with Google TV are bundled with a
Bluetooth remote control, which has dedicated buttons for opening
YouTube and
Netflix, as well as a
Google Assistant button for initiating voice commands or search queries through the remote's microphone. The remote can be programmed to control the power, volume, and input functions of televisions and soundbars through HDMI-
CEC or
infrared signals. Unlike some previous models that could be powered by a television's USB port, Chromecasts with Google TV require a power adapter, which connects via
USB-C. The 4K model shipped with
Android 10 and was later upgradeable to
Android 12 through a downloadable update. It supports HDR through the Dolby Vision, HDR10, and
HDR10+ formats, while also supporting the
Dolby Digital,
Dolby Digital Plus, and
Dolby Atmos audio formats. 2 GB of RAM, and an Amlogic S905D3 SoC. The HD model shipped with Android 12. Like the 4K model, it included 8 GB of internal storage,
Model comparison ==Software==